Whitworth screw thread

/ (ˈwɪtwəθ) /


noun
  1. 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

Origin of Whitworth screw thread

1
named after Sir Joseph Whitworth (1803–87), English engineer

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