This article underscores the role John Grant and his invention of a threading tool for creating taps and dies played in helping to establish Greenfield, Massachusetts, as a center known around the world for the manufacture of precision threading tools. In 1873, Grant organized the present tap and die branch of the Pratt and Whitney Manufacturing Company in Hartford, Connecticut. In 1874, he helped form the Wiley and Russell Manufacturing Company in Greenfield. Later, machinists who had worked for the company left and formed their own companies, some of which merged in 1912, to become the Greenfield Tap & Die Corporation. Business for the company peaked during World War II, when it produced tools needed in the war effort.
Greenfield Recorder-Gazette. “GTD Makes John Grant’s Invention Known Around World.” June 9, 1953. Pocumtuck Valley Memorial Association, American Centuries. https://americancenturies.org/collection/l06-012/. Accessed on October 16, 2024.
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