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Denoting a standard series of screw threads in imperial sizes.‘They were also less prone to misalignment or cross threading than either the traditional design or even the Whitworth thread.’‘I have an old machine which has Whitworth screws on so to find out which they were I got a Whitworth thread gauge from my local D.I.Y. shop.’
Late 19th century from the name of Sir Joseph Whitworth (1803–87), English engineer.
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