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Person

Joseph Whitworth

A formal portrait of Joseph Whitworth, an English engineer from the 19th century, wearing a dark suit with a white cravat, set against a dark background.

English engineer (1803–1887) who trained under Maudslay before opening his own works in Manchester. In 1841 he proposed a standardised screw thread — 55-degree flank angle, fixed pitch per diameter — that became the British Standard Whitworth thread and the first national fastener standard anywhere. He also built rifles, artillery and measuring machines accurate to a millionth of an inch.

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