(ˈwɪtwəθ) n (General Engineering) a thread form and system of standard sizes, proposed by Whitworth in 1841 and adopted as standard in the U.K., having a flank angle of 55° and a rounded top and foot[named after Sir Joseph Whitworth (1803–87), English engineer]
Whitworth screw thread
Whitworth screw thread
[′wit‚wərth ′skrü ‚thred] (design engineering) A British screw thread standardized to form and dimension.