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id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Torx" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Torx" title="You're encouraged to log in; 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data-event-name="pinnable-header.vector-toc.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">hide</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">(Top)</div> </a> </li> <li id="toc-Principles_of_operation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Principles_of_operation"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Principles of operation</span> </div> </a> <ul id="toc-Principles_of_operation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sizing" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Sizing"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Sizing</span> </div> </a> <ul id="toc-Sizing-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Variants" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Variants"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Variants</span> </div> </a> <button aria-controls="toc-Variants-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Variants subsection</span> </button> <ul id="toc-Variants-sublist" class="vector-toc-list"> <li id="toc-Security_Torx" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Security_Torx"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Security Torx</span> </div> </a> <ul id="toc-Security_Torx-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Torx_Paralobe" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Torx_Paralobe"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Torx Paralobe</span> </div> </a> <ul id="toc-Torx_Paralobe-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Torx_Plus" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Torx_Plus"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Torx Plus</span> </div> </a> <ul id="toc-Torx_Plus-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Torx_ttap" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Torx_ttap"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>Torx ttap</span> </div> </a> <ul id="toc-Torx_ttap-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-AudiTorx" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#AudiTorx"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.5</span> <span>AudiTorx</span> </div> </a> <ul id="toc-AudiTorx-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_(inverted)_Torx" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#External_(inverted)_Torx"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.6</span> <span>External (inverted) Torx</span> </div> </a> <ul id="toc-External_(inverted)_Torx-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Competitive_variants" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Competitive_variants"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Competitive variants</span> </div> </a> <ul id="toc-Competitive_variants-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Gallery" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Gallery"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Gallery</span> </div> </a> <ul id="toc-Gallery-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Explanatory_notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Explanatory_notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Explanatory notes</span> </div> </a> <ul id="toc-Explanatory_notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" 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Available in 23 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-23" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">23 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D9%88%D8%B1%D9%83%D8%B3_(%D9%85%D9%81%D9%83)" title="توركس (مفك) – Arabic" lang="ar" hreflang="ar" data-title="توركس (مفك)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Torx" title="Torx – Catalan" lang="ca" hreflang="ca" data-title="Torx" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Torx" title="Torx – Czech" lang="cs" hreflang="cs" data-title="Torx" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Torx" title="Torx – Danish" lang="da" hreflang="da" data-title="Torx" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Torx" title="Torx – German" lang="de" hreflang="de" data-title="Torx" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Torx" title="Torx – Estonian" lang="et" hreflang="et" data-title="Torx" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Torx" title="Torx – Spanish" lang="es" hreflang="es" data-title="Torx" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Cl%C3%A9_Torx" title="Clé Torx – French" lang="fr" hreflang="fr" data-title="Clé Torx" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%86%A1%EC%8A%A4_(%EC%83%81%ED%91%9C)" title="톡스 (상표) – Korean" lang="ko" hreflang="ko" data-title="톡스 (상표)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Torx" title="Torx – Italian" lang="it" hreflang="it" data-title="Torx" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%98%D7%95%D7%A8%D7%A7%D7%A1" title="טורקס – Hebrew" lang="he" hreflang="he" data-title="טורקס" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-avk mw-list-item"><a href="https://avk.wikipedia.org/wiki/Torx_suola" title="Torx suola – Kotava" lang="avk" hreflang="avk" data-title="Torx suola" data-language-autonym="Kotava" data-language-local-name="Kotava" class="interlanguage-link-target"><span>Kotava</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Torx" title="Torx – Hungarian" lang="hu" hreflang="hu" data-title="Torx" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Torx" title="Torx – Dutch" lang="nl" hreflang="nl" data-title="Torx" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%88%E3%83%AB%E3%82%AF%E3%82%B9" title="トルクス – Japanese" lang="ja" hreflang="ja" data-title="トルクス" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Torxn%C3%B8kkel" title="Torxnøkkel – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Torxnøkkel" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Torx" title="Torx – Polish" lang="pl" hreflang="pl" data-title="Torx" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Torx" title="Torx – Portuguese" lang="pt" hreflang="pt" data-title="Torx" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Torx" title="Torx – Russian" lang="ru" hreflang="ru" data-title="Torx" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Torx" title="Torx – Swedish" lang="sv" hreflang="sv" data-title="Torx" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Torx" title="Torx – Ukrainian" lang="uk" hreflang="uk" data-title="Torx" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/Torx" title="Torx – Yoruba" lang="yo" hreflang="yo" data-title="Torx" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%A2%85%E8%8A%B1%E8%9E%BA%E7%B5%B2" title="梅花螺絲 – Chinese" lang="zh" hreflang="zh" data-title="梅花螺絲" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1417378#sitelinks-wikipedia" title="Edit 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flower-petal pattern</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Star key" redirects here. For the key on a telephone keypad, see <a href="/wiki/Asterisk#Telephony" title="Asterisk">asterisk § Telephony</a>.</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Torx" title="Special:EditPage/Torx">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Torx%22">"Torx"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Torx%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Torx%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Torx%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Torx%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Torx%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">March 2013</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg/220px-18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg" decoding="async" width="220" height="146" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/35/18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg/330px-18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/35/18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg/440px-18-04-13-Schrauben-Schl%C3%BCssel_RRK3428.jpg 2x" data-file-width="3108" data-file-height="2064" /></a><figcaption>A security Torx L-key and fastener with holes for a safety pin to hinder disassembly with an ordinary Torx key.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Torx_screw.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Torx_screw.JPG/220px-Torx_screw.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Torx_screw.JPG/330px-Torx_screw.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Torx_screw.JPG/440px-Torx_screw.JPG 2x" data-file-width="2048" data-file-height="1536" /></a><figcaption>A Torx T8 screw head on a <a href="/wiki/Hard_disk_drive" title="Hard disk drive">hard disk drive</a>.</figcaption></figure> <p><b>Torx</b> (pronounced <span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="'t' in 'tie'">t</span><span title="/ɔːr/: 'ar' in 'war'">ɔːr</span><span title="'k' in 'kind'">k</span><span title="'s' in 'sigh'">s</span></span>/</a></span></span>) is a trademark for a type of <a href="/wiki/Screw_drive" class="mw-redirect" title="Screw drive">screw drive</a> characterized by a 6-point star-shaped pattern, developed in 1967<sup id="cite_ref-patent667_1-0" class="reference"><a href="#cite_note-patent667-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> by Camcar <a href="/wiki/Textron" title="Textron">Textron</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> A popular generic name for the drive is <i>star</i>, as in <b>star screwdriver</b> or <b>star bits</b>. The official generic name, standardized by the <a href="/wiki/International_Organization_for_Standardization" title="International Organization for Standardization">International Organization for Standardization</a> as <b>ISO 10664</b>, is <b>hexalobular internal</b>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> This is sometimes abbreviated in databases and catalogs as <b>6lobe</b> (starting with the numeral <i>6</i>, not the capital letter <i>G</i>). <b>Torx Plus,</b> <b>Torx Paralobe</b> and <b>Torx ttap</b> are improved head profiles.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Torx screws are commonly found on <a href="/wiki/Automobile" class="mw-redirect" title="Automobile">automobiles</a>, <a href="/wiki/Motorcycle" title="Motorcycle">motorcycles</a>, <a href="/wiki/Bicycle_brake_systems" class="mw-redirect" title="Bicycle brake systems">bicycle brake systems</a> (<a href="/wiki/Disc_brakes" class="mw-redirect" title="Disc brakes">disc brakes</a>), <a href="/wiki/Hard_disk_drives" class="mw-redirect" title="Hard disk drives">hard disk drives</a>, <a href="/wiki/Computer" title="Computer">computer</a> systems and <a href="/wiki/Consumer_electronics" title="Consumer electronics">consumer electronics</a>. Initially, they were sometimes used in applications requiring <a href="/wiki/Tamper_resistance" class="mw-redirect" title="Tamper resistance">tamper resistance</a>, since the drive systems and <a href="/wiki/Screwdriver" title="Screwdriver">screwdrivers</a> were not widely available. However, as torx drivers became more common, tamper-resistant <a class="mw-selflink-fragment" href="#Competitive_variants">variants</a>, as described below, were developed.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Torx screws are also becoming increasingly popular in construction industries. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Principles_of_operation">Principles of operation</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=1" title="Edit section: Principles of operation"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Torx-hex-contact-angles-forces.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Torx-hex-contact-angles-forces.svg/170px-Torx-hex-contact-angles-forces.svg.png" decoding="async" width="170" height="349" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Torx-hex-contact-angles-forces.svg/255px-Torx-hex-contact-angles-forces.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/65/Torx-hex-contact-angles-forces.svg/340px-Torx-hex-contact-angles-forces.svg.png 2x" data-file-width="378" data-file-height="777" /></a><figcaption>The angle between the plane of contact between tool and fastener and the circumferentially directed force is much closer to 90° in a Torx type of head (lower) than in a conventional <a href="/wiki/Hex_key" title="Hex key">hex</a> head (upper). (Exaggerated for illustrational purposes)</figcaption></figure> <p>By design, Torx head screws resist <a href="/wiki/Cam_out" title="Cam out">cam out</a> better than <a href="/wiki/Phillips_head" class="mw-redirect" title="Phillips head">Phillips head</a> or <a href="/wiki/Slot_head" class="mw-redirect" title="Slot head">slot head</a> screws.<sup id="cite_ref-patent667_1-1" class="reference"><a href="#cite_note-patent667-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Whereas the tendency of Phillips drivers to cam out under excessive torque has been listed as a feature preventing damage to the screw-head or driver,<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Torx heads were designed to <i>prevent</i> cam-out. The development of better <a href="/wiki/Torque_limiter" title="Torque limiter">torque-limiting</a> automatic screwdrivers for use in factories allowed this change. Rather than rely on the tool to slip out of the screw head when a desired torque level is reached (which risks damage to the driver tip, screw head, or workpiece), torque-limiting driver designs achieve a desired torque consistently. </p><p>The Torx design allows for a higher torque to be exerted than a similarly sized conventional hex socket head without damaging the head or the tool.<sup id="cite_ref-patent667_1-2" class="reference"><a href="#cite_note-patent667-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> The diagram depicts the interaction between the male and female components of a conventional hex drive and a Torx drive. The clearance between the components is exaggerated for clarity. </p><p>The green circle, passing through the six points of contact between the two components, represents the direction of the rotational force being exerted at each of those points. Because the plane of contact is not perpendicular to this circle, a radial force is also generated which tends to "burst" the female component and "crush" the male one. If this radial force component is too great for the material to withstand, it will cause the corners to be rounded off one or both components or will split the sides of the female part. The magnitude of this force is proportional to the <a href="/wiki/Cotangent" class="mw-redirect" title="Cotangent">cotangent</a> of the angle (depicted in orange) between the green circle and the contact plane. </p><p>For the Torx type of design, the angle is much closer to 90° than in the case of the hex head, and so for a given torque the potentially damaging radial force is much lower. This property allows the head of the fastener to be smaller for the same required torque, which can be an advantage in applications where space to accommodate the head is limited. </p> <div class="mw-heading mw-heading2"><h2 id="Sizing">Sizing</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=2" title="Edit section: Sizing"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl 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.sidebar{width:22em;float:right;clear:right;margin:0.5em 0 1em 1em;background:var(--background-color-neutral-subtle,#f8f9fa);border:1px solid var(--border-color-base,#a2a9b1);padding:0.2em;text-align:center;line-height:1.4em;font-size:88%;border-collapse:collapse;display:table}body.skin-minerva .mw-parser-output .sidebar{display:table!important;float:right!important;margin:0.5em 0 1em 1em!important}.mw-parser-output .sidebar-subgroup{width:100%;margin:0;border-spacing:0}.mw-parser-output .sidebar-left{float:left;clear:left;margin:0.5em 1em 1em 0}.mw-parser-output .sidebar-none{float:none;clear:both;margin:0.5em 1em 1em 0}.mw-parser-output .sidebar-outer-title{padding:0 0.4em 0.2em;font-size:125%;line-height:1.2em;font-weight:bold}.mw-parser-output .sidebar-top-image{padding:0.4em}.mw-parser-output .sidebar-top-caption,.mw-parser-output .sidebar-pretitle-with-top-image,.mw-parser-output .sidebar-caption{padding:0.2em 0.4em 0;line-height:1.2em}.mw-parser-output .sidebar-pretitle{padding:0.4em 0.4em 0;line-height:1.2em}.mw-parser-output .sidebar-title,.mw-parser-output .sidebar-title-with-pretitle{padding:0.2em 0.8em;font-size:145%;line-height:1.2em}.mw-parser-output .sidebar-title-with-pretitle{padding:0.1em 0.4em}.mw-parser-output .sidebar-image{padding:0.2em 0.4em 0.4em}.mw-parser-output .sidebar-heading{padding:0.1em 0.4em}.mw-parser-output .sidebar-content{padding:0 0.5em 0.4em}.mw-parser-output .sidebar-content-with-subgroup{padding:0.1em 0.4em 0.2em}.mw-parser-output .sidebar-above,.mw-parser-output .sidebar-below{padding:0.3em 0.8em;font-weight:bold}.mw-parser-output .sidebar-collapse .sidebar-above,.mw-parser-output .sidebar-collapse .sidebar-below{border-top:1px solid #aaa;border-bottom:1px solid #aaa}.mw-parser-output .sidebar-navbar{text-align:right;font-size:115%;padding:0 0.4em 0.4em}.mw-parser-output .sidebar-list-title{padding:0 0.4em;text-align:left;font-weight:bold;line-height:1.6em;font-size:105%}.mw-parser-output .sidebar-list-title-c{padding:0 0.4em;text-align:center;margin:0 3.3em}@media(max-width:640px){body.mediawiki .mw-parser-output .sidebar{width:100%!important;clear:both;float:none!important;margin-left:0!important;margin-right:0!important}}body.skin--responsive .mw-parser-output .sidebar a>img{max-width:none!important}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-list-title,html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .sidebar:not(.notheme) .sidebar-title-with-pretitle a{color:var(--color-progressive)!important}}@media print{body.ns-0 .mw-parser-output .sidebar{display:none!important}}</style><table class="sidebar nomobile hlist"><tbody><tr><td class="sidebar-pretitle">Part of a series on</td></tr><tr><th class="sidebar-title-with-pretitle"><a href="/wiki/List_of_screw_drives" title="List of screw drives">Screw drive</a> types</th></tr><tr><th class="sidebar-heading"> Slotted</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#Slot" title="List of screw drives">Slot drive</a></li> <li><a href="/wiki/List_of_screw_drives#Cross" title="List of screw drives">Cross</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Cruciform</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#Frearson" title="List of screw drives">Frearson</a></li> <li><a href="/wiki/List_of_screw_drives#French_recess" title="List of screw drives">French recess</a></li> <li><a href="/wiki/List_of_screw_drives#ISO_8764" title="List of screw drives">ISO 8764</a></li> <li><a href="/wiki/List_of_screw_drives#JIS_B_1012" title="List of screw drives">JIS B 1012</a></li> <li><a href="/wiki/List_of_screw_drives#Mortorq" title="List of screw drives">Mortorq</a></li> <li><a href="/wiki/List_of_screw_drives#Phillips" title="List of screw drives">Phillips</a></li> <li><a href="/wiki/List_of_screw_drives#Pozidriv" title="List of screw drives">Pozidriv</a></li> <li><a href="/wiki/List_of_screw_drives#Supadriv" title="List of screw drives">Supadriv</a></li> <li><a href="/wiki/List_of_screw_drives#Torq-set" title="List of screw drives">Torq-set</a></li> <li><a href="/wiki/List_of_screw_drives#Combination_drives_(plus-minus)" title="List of screw drives">Phillips/Slotted</a></li></ul></td> </tr><tr><th class="sidebar-heading"> External polygon</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#Square" title="List of screw drives">Square</a></li> <li><a href="/wiki/List_of_screw_drives#Pentagon" title="List of screw drives">Pentagon</a></li> <li><a href="/wiki/List_of_screw_drives#Hex" title="List of screw drives">Hex</a></li> <li><a href="/wiki/List_of_screw_drives#12-point" title="List of screw drives">12-point</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Internal polygon</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#Tri-angle" title="List of screw drives">Tri-angle</a></li> <li><a href="/wiki/List_of_screw_drives#Robertson" title="List of screw drives">Robertson (square)</a></li> <li><a href="/wiki/Hex_key" title="Hex key">Hex socket (Allen)</a></li> <li><a href="/wiki/Hex_key#Variants" title="Hex key">Security hex</a></li> <li><a href="/wiki/List_of_screw_drives#Double-square" title="List of screw drives">Double-square</a></li> <li><a href="/wiki/List_of_screw_drives#Triple-square_(XZN)" title="List of screw drives">Triple-square</a></li> <li><a href="/wiki/List_of_screw_drives#12-spline_flange" title="List of screw drives">12-spline flange</a></li> <li><a href="/wiki/List_of_screw_drives#Double_hex" title="List of screw drives">Double hex</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Hexalobular</th></tr><tr><td class="sidebar-content"> <ul><li><a class="mw-selflink selflink">Torx</a></li> <li><a href="/wiki/List_of_screw_drives#Polydrive" title="List of screw drives">Polydrive</a></li> <li><a href="/wiki/List_of_screw_drives#Torx_ttap" title="List of screw drives">Torx ttap</a></li> <li><a class="mw-selflink selflink">External Torx</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Three-pointed</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#Tri-point" title="List of screw drives">Tri-point</a></li> <li><a href="/wiki/List_of_screw_drives#Tri-groove" title="List of screw drives">Tri-groove</a></li> <li><a href="/wiki/List_of_screw_drives#Tri-wing" title="List of screw drives">Tri-wing</a></li></ul></td> </tr><tr><th class="sidebar-heading"> Special</th></tr><tr><td class="sidebar-content"> <ul><li><a href="/wiki/List_of_screw_drives#One-way" title="List of screw drives">One-way</a></li> <li><a href="/wiki/List_of_screw_drives#Spline_socket" title="List of screw drives">Spline socket</a></li> <li><a href="/wiki/List_of_screw_drives#Phillips/square" title="List of screw drives">Quadrex</a></li> <li><a href="/wiki/Pentalobe_screw" title="Pentalobe screw">Pentalobe</a></li> <li><a href="/wiki/List_of_screw_drives#Spanner" title="List of screw drives">Spanner head</a></li> <li><a href="/wiki/List_of_screw_drives#Line_Head_and_Line_Recess" title="List of screw drives">Line Head</a></li></ul></td> </tr><tr><td class="sidebar-navbar"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Screw_drives" title="Template:Screw drives"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Screw_drives" title="Template talk:Screw drives"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Screw_drives" title="Special:EditPage/Template:Screw drives"><abbr title="Edit this template">e</abbr></a></li></ul></div></td></tr></tbody></table> <p>Torx head sizes are described using the capital letter "T" followed by a number ranging from T1 to T100.<sup id="cite_ref-WihaChart_7-0" class="reference"><a href="#cite_note-WihaChart-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Some manufacturers and resellers head sizes are also described using "TX" or "Tx" in front of the number.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> A smaller number corresponds to a smaller point-to-point dimension of the screw head (diameter of circle circumscribed on the cross-section of the tip of the screw driver). Common sizes include T10, T15, and T25, while T35 and T47 tend to see specialized use. Only the proper driver can drive a specific head size without risk of damaging the driver or screw. The same series of Torx drivers is used to drive <a href="/wiki/Society_of_Automotive_Engineers" class="mw-redirect" title="Society of Automotive Engineers">SAE</a>, <a href="/wiki/Metric_screw_thread" class="mw-redirect" title="Metric screw thread">metric</a> and other thread system fasteners, reducing the number of bit sizes required. </p><p>The "external" variants of Torx head sizes (see below) are described using the capital letter "E" followed by a number ranging from E4 to E44.<sup id="cite_ref-Textron_10-0" class="reference"><a href="#cite_note-Textron-10"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> The "E" numbers are different from the "T" numbers of the same size: for example, an E4 Torx socket fits a T20 head.<sup id="cite_ref-WihaChart_7-1" class="reference"><a href="#cite_note-WihaChart-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable" style="text-align:center;"> <caption>Properties of various Torx drives<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-WihaChart_7-2" class="reference"><a href="#cite_note-WihaChart-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </caption> <tbody><tr style="vertical-align:bottom;"> <th rowspan="2" scope="col">Size </th> <th colspan="2" scope="col">Point-to-point distance </th> <th colspan="2" scope="col">Maximum torque range </th> <th rowspan="2" scope="col">~ E Torx </th></tr> <tr> <th scope="col">(in) </th> <th scope="col">(mm) </th> <th scope="col">(lb·ft) </th> <th scope="col">(N·m) </th></tr> <tr> <td>T1 </td> <td style="text-align:center;">0.035 </td> <td style="text-align:center;">0.90 </td> <td style="text-align:center;">0.015–0.022 </td> <td style="text-align:center;">0.02–0.03 </td> <td> </td></tr> <tr> <td>T2 </td> <td style="text-align:center;">0.039 </td> <td style="text-align:center;">1.00 </td> <td style="text-align:center;">0.052–0.066 </td> <td style="text-align:center;">0.07–0.09 </td> <td> </td></tr> <tr> <td>T3 </td> <td style="text-align:center;">0.047 </td> <td style="text-align:center;">1.20 </td> <td style="text-align:center;">0.10–0.13 </td> <td style="text-align:center;">0.14–0.18 </td> <td> </td></tr> <tr> <td>T4 </td> <td style="text-align:center;">0.053 </td> <td style="text-align:center;">1.35 </td> <td style="text-align:center;">0.16–0.21 </td> <td style="text-align:center;">0.22–0.28 </td> <td> </td></tr> <tr> <td>T5 </td> <td style="text-align:center;">0.059 </td> <td style="text-align:center;">1.50 </td> <td style="text-align:center;">0.32–0.38 </td> <td style="text-align:center;">0.43–0.51 </td> <td>E2 </td></tr> <tr> <td>T6 </td> <td style="text-align:center;">0.069 </td> <td style="text-align:center;">1.75 </td> <td style="text-align:center;">0.55–0.66 </td> <td style="text-align:center;">0.75–0.90 </td> <td> </td></tr> <tr> <td>T7 </td> <td style="text-align:center;">0.083 </td> <td style="text-align:center;">2.10 </td> <td style="text-align:center;">1.0–1.3 </td> <td style="text-align:center;">1.4–1.7 </td> <td> </td></tr> <tr> <td>T8 </td> <td style="text-align:center;">0.094 </td> <td style="text-align:center;">2.40 </td> <td style="text-align:center;">1.6–1.9 </td> <td style="text-align:center;">2.2–2.6 </td> <td> </td></tr> <tr> <td>T9 </td> <td style="text-align:center;">0.102 </td> <td style="text-align:center;">2.60 </td> <td style="text-align:center;">2.1–2.5 </td> <td style="text-align:center;">2.8–3.4 </td> <td> </td></tr> <tr> <td>T10 </td> <td style="text-align:center;">0.110 </td> <td style="text-align:center;">2.80 </td> <td style="text-align:center;">2.7–3.3 </td> <td style="text-align:center;">3.7–4.5 </td> <td> </td></tr> <tr> <td>T15 </td> <td style="text-align:center;">0.132 </td> <td style="text-align:center;">3.35 </td> <td style="text-align:center;">4.7–5.7 </td> <td style="text-align:center;">6.4–7.7 </td> <td> </td></tr> <tr> <td>T20 </td> <td style="text-align:center;">0.156 </td> <td style="text-align:center;">3.95 </td> <td style="text-align:center;">7.7–9.4 </td> <td style="text-align:center;">10.5–12.7 </td> <td>E4 </td></tr> <tr> <td>T25 </td> <td style="text-align:center;">0.177 </td> <td style="text-align:center;">4.50 </td> <td style="text-align:center;">11.7–14.0 </td> <td style="text-align:center;">15.9–19 </td> <td>E5 </td></tr> <tr> <td>T27 </td> <td style="text-align:center;">0.201 </td> <td style="text-align:center;">5.10 </td> <td style="text-align:center;">16.6–19.8 </td> <td style="text-align:center;">22.5–26.9 </td> <td> </td></tr> <tr> <td>T30 </td> <td style="text-align:center;">0.220 </td> <td style="text-align:center;">5.60 </td> <td style="text-align:center;">22.9–27.6 </td> <td style="text-align:center;">31.1–37.4 </td> <td>E6 </td></tr> <tr> <td>T35<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </td> <td style="text-align:center;">0.232 </td> <td style="text-align:center;">5.90 </td> <td> </td> <td> </td> <td>E7 </td></tr> <tr> <td>T40 </td> <td style="text-align:center;">0.266 </td> <td style="text-align:center;">6.75 </td> <td style="text-align:center;">39.9–48.0 </td> <td style="text-align:center;">54.1–65.1 </td> <td>E8 </td></tr> <tr> <td>T45 </td> <td style="text-align:center;">0.312 </td> <td style="text-align:center;">7.93 </td> <td style="text-align:center;">63.4–76.1 </td> <td style="text-align:center;">86–103.2 </td> <td> </td></tr> <tr> <td>T47<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </td> <td>GM-Style </td> <td> </td> <td> </td> <td> </td> <td> </td></tr> <tr> <td>T50 </td> <td style="text-align:center;">0.352 </td> <td style="text-align:center;">8.95 </td> <td style="text-align:center;">97–117 </td> <td style="text-align:center;">132–158 </td> <td>E10 </td></tr> <tr> <td>T55 </td> <td style="text-align:center;">0.447 </td> <td style="text-align:center;">11.35 </td> <td style="text-align:center;">161–189 </td> <td style="text-align:center;">218–256 </td> <td>E12 </td></tr> <tr> <td>T60 </td> <td style="text-align:center;">0.530 </td> <td style="text-align:center;">13.45 </td> <td style="text-align:center;">280–328 </td> <td style="text-align:center;">379–445 </td> <td>E16 </td></tr> <tr> <td>T70 </td> <td style="text-align:center;">0.618 </td> <td style="text-align:center;">15.70 </td> <td style="text-align:center;">460–520 </td> <td style="text-align:center;">630–700 </td> <td>E18 </td></tr> <tr> <td>T80 </td> <td style="text-align:center;">0.699 </td> <td style="text-align:center;">17.75 </td> <td style="text-align:center;">696–773 </td> <td style="text-align:center;">943–1,048 </td> <td>E20 </td></tr> <tr> <td>T90 </td> <td style="text-align:center;">0.795 </td> <td style="text-align:center;">20.20 </td> <td style="text-align:center;">984–1,094 </td> <td style="text-align:center;">1,334–1,483 </td> <td> </td></tr> <tr> <td>T100 </td> <td style="text-align:center;">0.882 </td> <td style="text-align:center;">22.40 </td> <td style="text-align:center;">1,359–1,511 </td> <td style="text-align:center;">1,843–2,048 </td> <td>E24 </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Variants">Variants</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=3" title="Edit section: Variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Although the brand "Torx" generally refers to the standard 6-star-driver or -socket, there are many variations to the original design, including a number made or licensed by Torx. Other tool manufacturers have been producing 8-, 10- and 12-point star drivers and sockets for many decades. The Torx brand is often used universally to describe these and other star driver variations. </p> <div class="mw-heading mw-heading3"><h3 id="Security_Torx">Security Torx</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=4" title="Edit section: Security Torx"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Torx_driver_secure.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Torx_driver_secure.png/110px-Torx_driver_secure.png" decoding="async" width="110" height="111" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Torx_driver_secure.png/165px-Torx_driver_secure.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Torx_driver_secure.png/220px-Torx_driver_secure.png 2x" data-file-width="274" data-file-height="276" /></a><figcaption>Security Torx driver</figcaption></figure> <p>A version known as <b>Security Torx</b>, <b>Tamper-Resistant Torx</b> (often shortened to <b>Torx TR</b>) or <b>pin-in Torx</b> contains a post in the center of the head that prevents a standard Torx driver from being inserted. However, the pin allows a smaller flat head screw driver to be used successfully between two adjacent lobes. </p><p>Security Torx has its own set of variations, and many other variations of Torx drives are available in Security or TR versions. These include five- and seven-lobed TR heads.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Torx_Paralobe">Torx Paralobe</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=5" title="Edit section: Torx Paralobe"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Screw_Head_-_Torx_Paralobe.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Screw_Head_-_Torx_Paralobe.svg/110px-Screw_Head_-_Torx_Paralobe.svg.png" decoding="async" width="110" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Screw_Head_-_Torx_Paralobe.svg/165px-Screw_Head_-_Torx_Paralobe.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Screw_Head_-_Torx_Paralobe.svg/220px-Screw_Head_-_Torx_Paralobe.svg.png 2x" data-file-width="512" data-file-height="512" /></a><figcaption>Torx Paralobe head pattern</figcaption></figure> <p><b>Torx Paralobe</b> is a further developed Torx Drive System with 6% longer flanks which results in a 20% higher applicable torque.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Torx_Plus">Torx Plus</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=6" title="Edit section: Torx Plus"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Screw_Head_-_Torx_Plus.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Screw_Head_-_Torx_Plus.svg/110px-Screw_Head_-_Torx_Plus.svg.png" decoding="async" width="110" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Screw_Head_-_Torx_Plus.svg/165px-Screw_Head_-_Torx_Plus.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Screw_Head_-_Torx_Plus.svg/220px-Screw_Head_-_Torx_Plus.svg.png 2x" data-file-width="512" data-file-height="512" /></a><figcaption>Torx Plus head pattern</figcaption></figure> <p>A Torx successor, <b>Torx Plus</b>, was introduced around 1990 when the original Torx patent was expiring. The Torx Plus patent subsequently expired in 2011.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> The lobes are more square to allow for higher torque and to minimize wear. The name is shortened to <b>IP</b> (Internal Plus) with sizes ranging from 1IP to 100IP <sup id="cite_ref-TORX_PLUS_19-0" class="reference"><a href="#cite_note-TORX_PLUS-19"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> (sometimes listed as IP1 to IP100 <sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup>) and <b>EP</b> (External Plus) with sizes ranging from 1EP to 42EP as well as smaller sizes ranging from H7EP to H2EP and includes five-lobed tamper-resistant variants.<sup id="cite_ref-TORX_PLUS_19-1" class="reference"><a href="#cite_note-TORX_PLUS-19"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> The specifications for these licenses are held by Textron. Standard Torx drivers can be used to drive Torx Plus screws, but not to full torque because of the loose fit. Torx Plus drivers will not fit into standard Torx screws. </p> <ul><li>A tamper-resistant version of Torx Plus exists having <b>five</b> lobes rather than six, plus a solid post in the center, and is used for security as the drivers are uncommon.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Though Acument (formerly Textron) lists no designation,<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> <b>TS</b><sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> or <b>IPR</b><sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> may be seen. The screw may alternatively be a <a href="/wiki/Pentalobe" class="mw-redirect" title="Pentalobe">Pentalobe</a>.</li> <li><b>Torx Plus Maxx Stems</b> is a highly specialized variant used on the ends of fasteners opposite the bolt-head, and provides higher torque than other drive systems allow.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup> Torxstem is a stud with the Torx Plus Maxx drive on both ends.</li></ul> <div class="mw-heading mw-heading3"><h3 id="Torx_ttap">Torx ttap</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=7" title="Edit section: Torx ttap"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Screw_Head_-_TTAP.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Screw_Head_-_TTAP.svg/110px-Screw_Head_-_TTAP.svg.png" decoding="async" width="110" height="110" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Screw_Head_-_TTAP.svg/165px-Screw_Head_-_TTAP.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Screw_Head_-_TTAP.svg/220px-Screw_Head_-_TTAP.svg.png 2x" data-file-width="512" data-file-height="512" /></a><figcaption>Torx Ttap head pattern</figcaption></figure> <p>A proprietary version of Torx called <b>Torx ttap</b> was developed in 2006 and is licensed by Acument Intellectual Properties.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup> It features a second recess to create a <a href="/wiki/Interference_fit" title="Interference fit">"stick-fit"</a> engagement (branded Frixion Fit), designed to minimize wobbling (branded Stable Drive) without pressing and the need for magnetic bits, a feature that can be important to certain industrial users.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> Standard Torx drivers can be used to drive Torx ttap screws, but Torx ttap drivers will not fit standard Torx screws.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="AudiTorx">AudiTorx</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=8" title="Edit section: AudiTorx"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>AudiTorx</b> is a tamper-proof fastener where a convex and smooth fastener head is topped with a break-away Torx drive that snaps off when the engineered torque is reached, leaving a rivet-like bolt head that cannot be easily removed. The main application for these fasteners is in the railroad industry.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="External_(inverted)_Torx"><span id="External_.28inverted.29_Torx"></span>External (inverted) Torx</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=9" title="Edit section: External (inverted) Torx"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:FemaleTorxSocket.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/91/FemaleTorxSocket.JPG/110px-FemaleTorxSocket.JPG" decoding="async" width="110" height="98" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/91/FemaleTorxSocket.JPG/165px-FemaleTorxSocket.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/91/FemaleTorxSocket.JPG/220px-FemaleTorxSocket.JPG 2x" data-file-width="250" data-file-height="222" /></a><figcaption>External Torx driver</figcaption></figure> <p>An <b>External Torx</b> version exists, also known as <b>Inverted Torx</b>, where the screw head has the shape of a Torx screwdriver bit, and a Torx socket is used to drive it. The external "E" Torx nominal sizing does not correlate to the "T" size, (e.g. an E40 socket is too large to fit a T40 Torx bit, while an E8 Torx socket will fit a T40 Torx bit<sup id="cite_ref-WihaChart_7-3" class="reference"><a href="#cite_note-WihaChart-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>). </p> <table class="wikitable mw-collapsible mw-collapsed" style="text-align:center;"> <caption>Properties of various External Torx drives </caption> <tbody><tr> <th rowspan="2" scope="col" style="valign:bottom;">Size </th> <th colspan="2" scope="col">Point-to-point distance<sup id="cite_ref-WihaChart_7-4" class="reference"><a href="#cite_note-WihaChart-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </th> <th colspan="2" scope="col">Standard fastener selection<sup id="cite_ref-Textron_10-1" class="reference"><a href="#cite_note-Textron-10"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </th></tr> <tr> <th scope="col">(in) </th> <th scope="col">(mm) </th> <th scope="col">SAE </th> <th scope="col">Metric </th></tr> <tr> <td>E4 </td> <td style="text-align:center;">0.15 </td> <td style="text-align:center;">3.8 </td> <td>#6 </td> <td>M3 </td></tr> <tr> <td>E5 </td> <td style="text-align:center;">0.19 </td> <td style="text-align:center;">4.7 </td> <td>#8 </td> <td>M4 </td></tr> <tr> <td>E6 </td> <td style="text-align:center;">0.22 </td> <td style="text-align:center;">5.6 </td> <td>#10 </td> <td>M5 </td></tr> <tr> <td>E7 </td> <td style="text-align:center;">0.24 </td> <td style="text-align:center;">6.1 </td> <td> </td> <td> </td></tr> <tr> <td>E8 </td> <td style="text-align:center;">0.29 </td> <td style="text-align:center;">7.4 </td> <td>1/4" </td> <td>M6 & M7 </td></tr> <tr> <td>E10 </td> <td style="text-align:center;">0.37 </td> <td style="text-align:center;">9.3 </td> <td>5/16" </td> <td>M8 </td></tr> <tr> <td>E12 </td> <td style="text-align:center;">0.44 </td> <td style="text-align:center;">11.1 </td> <td>3/8" </td> <td>M10 & M11 </td></tr> <tr> <td>E14 </td> <td style="text-align:center;">0.50 </td> <td style="text-align:center;">12.8 </td> <td>7/16" </td> <td>M12 </td></tr> <tr> <td>E16 </td> <td style="text-align:center;">0.58 </td> <td style="text-align:center;">14.7 </td> <td>1/2" </td> <td> </td></tr> <tr> <td>E18 </td> <td style="text-align:center;">0.65 </td> <td style="text-align:center;">16.6 </td> <td>9/16" </td> <td>M14 </td></tr> <tr> <td>E20 </td> <td style="text-align:center;">0.72 </td> <td style="text-align:center;">18.4 </td> <td>5/8" </td> <td>M16 </td></tr> <tr> <td>E24 </td> <td style="text-align:center;">0.87 </td> <td style="text-align:center;">22.1 </td> <td>3/4" </td> <td>M18 & M20 </td></tr> <tr> <td>E28 </td> <td> </td> <td> </td> <td>7/8" </td> <td>M22 </td></tr> <tr> <td>E32 </td> <td> </td> <td> </td> <td>1" </td> <td>M24 & M27 </td></tr> <tr> <td>E36 </td> <td> </td> <td> </td> <td>1-1/8" </td> <td>M30 </td></tr> <tr> <td>E40 </td> <td> </td> <td> </td> <td>1-1/4" </td> <td>M33 </td></tr> <tr> <td>E44 </td> <td> </td> <td> </td> <td>1-3/8" </td> <td>M36 </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Competitive_variants">Competitive variants</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=10" title="Edit section: Competitive variants"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>AW drive</b> is a hexalobular-type screw head similar to Torx, with a tapered profile to aid in centering, developed by the <a href="/wiki/W%C3%BCrth" title="Würth">Würth</a> Group in Germany.<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> It is available in five sizes: AW 10, AW 20, AW 25, AW 30 and AW 40.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> </p><p><b>T-Star plus</b> has a similar screw drive design to Torx ttap and was introduced in 2005 by German fastener manufacturer <a href="/wiki/Altenloh,_Brinck_%26_Co" title="Altenloh, Brinck & Co">Altenloh, Brinck & Co</a> under its brand name <i>Spax</i>.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Gallery">Gallery</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=11" title="Edit section: Gallery"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 180px;"><span typeof="mw:File"><a href="/wiki/File:Torx-Bits_T15-T20-T25-T30.jpg" class="mw-file-description" title="Torx bits T15, T20, T25, and T30"><img alt="Torx bits T15, T20, T25, and T30" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Torx-Bits_T15-T20-T25-T30.jpg/200px-Torx-Bits_T15-T20-T25-T30.jpg" decoding="async" width="200" height="120" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Torx-Bits_T15-T20-T25-T30.jpg/300px-Torx-Bits_T15-T20-T25-T30.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1c/Torx-Bits_T15-T20-T25-T30.jpg/400px-Torx-Bits_T15-T20-T25-T30.jpg 2x" data-file-width="1600" data-file-height="962" /></a></span></div> <div class="gallerytext">Torx bits T15, T20, T25, and T30</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 180px;"><span typeof="mw:File"><a href="/wiki/File:Torx_01_KMJ.jpg" class="mw-file-description" title="A Torx wrench"><img alt="A Torx wrench" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Torx_01_KMJ.jpg/200px-Torx_01_KMJ.jpg" decoding="async" width="200" height="112" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Torx_01_KMJ.jpg/300px-Torx_01_KMJ.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/66/Torx_01_KMJ.jpg/400px-Torx_01_KMJ.jpg 2x" data-file-width="768" data-file-height="430" /></a></span></div> <div class="gallerytext">A Torx wrench</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 180px;"><span typeof="mw:File"><a href="/wiki/File:Torx.jpg" class="mw-file-description" title="Closeup of Torx screwdriver tip"><img alt="Closeup of Torx screwdriver tip" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Torx.jpg/200px-Torx.jpg" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/78/Torx.jpg/300px-Torx.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/78/Torx.jpg/400px-Torx.jpg 2x" data-file-width="1024" data-file-height="768" /></a></span></div> <div class="gallerytext">Closeup of Torx screwdriver tip</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 180px;"><span typeof="mw:File"><a href="/wiki/File:18-03-22-Schrauben-M6x20_RRK3361.jpg" class="mw-file-description" title="A Torx T30 bolt"><img alt="A Torx T30 bolt" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/ba/18-03-22-Schrauben-M6x20_RRK3361.jpg/150px-18-03-22-Schrauben-M6x20_RRK3361.jpg" decoding="async" width="150" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/ba/18-03-22-Schrauben-M6x20_RRK3361.jpg/225px-18-03-22-Schrauben-M6x20_RRK3361.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/ba/18-03-22-Schrauben-M6x20_RRK3361.jpg/300px-18-03-22-Schrauben-M6x20_RRK3361.jpg 2x" data-file-width="2179" data-file-height="2179" /></a></span></div> <div class="gallerytext">A Torx T30 bolt</div> </li> </ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=12" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Wrench" title="Wrench">Wrench</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Explanatory_notes">Explanatory notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=13" title="Edit section: Explanatory notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text">Camcar eventually became part of <a href="/wiki/Textron" title="Textron">Textron</a> Fastening Systems in the 1990s. In 2006 Textron Fastening Systems was sold to Platinum Equities, LLC, of Beverly Hills, California. They renamed the company <a rel="nofollow" class="external text" href="http://www.acument.com/">Acument Global Technologies</a>, which as of 2010 includes Avdel, Camcar, Ring Screw, and others. In 2014, <a rel="nofollow" class="external text" href="http://www.platinumequity.com/news/907/platinum-equity-sells-acument-to-fontana-gruppo">Acument was sold</a> from Platinum Equity to Fontana Gruppo.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=14" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-patent667-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-patent667_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-patent667_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-patent667_1-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><span><a rel="nofollow" class="external text" href="https://patents.google.com/patent/US3584667">U.S. patent 3,584,667</a></span>, Bernard F. Reiland, "Coupling arrangement and tools for same", filed 1967-03-21</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.iso.org/iso/catalogue_detail.htm?csnumber=40257">"ISO 10664:2005"</a>. ISO.org<span class="reference-accessdate">. Retrieved <span class="nowrap">2012-01-14</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=ISO+10664%3A2005&rft.pub=ISO.org&rft_id=http%3A%2F%2Fwww.iso.org%2Fiso%2Fcatalogue_detail.htm%3Fcsnumber%3D40257&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATorx" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://fastenerengineering.com/what-is-a-torx-screw/">"What Is a Torx Screw?"</a>. <i>Fastener Engineering</i>. 2020-08-12<span class="reference-accessdate">. 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Retrieved <span class="nowrap">16 June</span> 2024</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Multi-Material+Construction+Screws&rft.pub=Spax+US&rft_id=https%3A%2F%2Fspax.us%2Fmulti-purpose-construction-screws&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATorx" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Torx&action=edit&section=15" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Media related to <a href="https://commons.wikimedia.org/wiki/Category:Torx" class="extiw" title="commons:Category:Torx">Torx</a> at Wikimedia Commons</li></ul>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Torx&oldid=1236016046">https://en.wikipedia.org/w/index.php?title=Torx&oldid=1236016046</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Category</a>: <ul><li><a href="/wiki/Category:Screws" title="Category:Screws">Screws</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:CS1_maint:_bot:_original_URL_status_unknown" title="Category:CS1 maint: bot: original URL status unknown">CS1 maint: bot: original URL status unknown</a></li><li><a href="/wiki/Category:Articles_with_short_description" title="Category:Articles with short description">Articles with short description</a></li><li><a href="/wiki/Category:Short_description_is_different_from_Wikidata" title="Category:Short description is different from Wikidata">Short description is different from Wikidata</a></li><li><a href="/wiki/Category:Articles_needing_additional_references_from_March_2013" title="Category:Articles needing additional references from March 2013">Articles needing additional references from March 2013</a></li><li><a href="/wiki/Category:All_articles_needing_additional_references" title="Category:All articles needing additional references">All articles needing additional references</a></li><li><a href="/wiki/Category:Commons_category_link_from_Wikidata" title="Category:Commons category link from Wikidata">Commons category link from Wikidata</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 22 July 2024, at 12:17<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright">Text is available under the <a href="/wiki/Wikipedia:Text_of_the_Creative_Commons_Attribution-ShareAlike_4.0_International_License" title="Wikipedia:Text of the Creative Commons Attribution-ShareAlike 4.0 International License">Creative Commons Attribution-ShareAlike 4.0 License</a>; additional terms may apply. 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