Have you looked at Whitworth threads -?
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https://en.wikipedia.org/wiki/British_Standard_Whitworth
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From Wikipedia -
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British Standard Whitworth?(BSW) is an?-based??standard, devised and specified by??in 1841 and later adopted as a?...
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The Whitworth thread was the world's first national screw thread standard,?devised and specified by??in 1841.
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Just a thought...
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ralphie
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Ralph Lehotsky