Unified Thread Standard

<p>The Unified Thread Standard (UTS) defines a standard thread form and series—along with allowances, tolerances, and designations—for <a href="/facts/Screw_thread/dqGzDfHv">screw threads</a> commonly used in the <a href="/facts/United_States/P0sCdLe5">United States</a> and <a href="/facts/Canada/cWWFM8oc">Canada</a>. It is the main standard for bolts, nuts, and a wide variety of other <a href="/facts/Threaded_fastener/earBwoS6">threaded fasteners</a> used in these countries. It has the same 60° profile as the <a href="/facts/ISO_metric_screw_thread/9ewufPYV">ISO metric screw thread</a>, but the characteristic dimensions of each UTS thread (outer diameter and pitch) were chosen as an <a href="/facts/Inch/CocFfm8p">inch</a> fraction rather than a <a href="/facts/Millimeter/25mdTXpa">millimeter</a> value. The UTS is currently controlled by <a href="/facts/American_Society_of_Mechanical_Engineers/gpM3UR6G">ASME</a>/<a href="/facts/American_National_Standards_Institute/p3d1TQCb">ANSI</a> in the United States.
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Unified Thread Standard open-in-new

Unified Thread Standard