Dimensions of an Acme thread
<ul><li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Wizard191" title="User:Wizard191">Wizard191</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Wizard191" title="User talk:Wizard191"><span class="signature-talk">talk</span></a>)</li>
<li><a href="//commons.wikimedia.org/wiki/File:Thread_Tr.svg" title="File:Thread Tr.svg">Thread_Tr.svg</a>: <a href="//commons.wikimedia.org/wiki/User:Zielu20" title="User:Zielu20">Zielu20</a></li></ul>
CC BY-SA 3.0
<ul><li><a href="//commons.wikimedia.org/wiki/File:Thread_Tr.svg" title="File:Thread Tr.svg">Thread_Tr.svg</a></li></ul>