unified screw thread


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unified screw thread

n
(General Engineering) a screw thread system introduced for defence equipment (1939–44), in which the thread form and pitch were a compromise between British Standard Whitworth and American Standard Sellers: adopted by the International Standards Organization
References in periodicals archive ?
Fractional screw threads in the United States are based on the Unified Screw Thread standard officially adopted in 1949.
The Unified Screw Thread System for commercial bolts, nuts and screws sets the standards in the United States and Canada.
The Unified screw thread has a 60-degree thread angle with a rounded root and a crest that is flat or rounded.
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