This “limit snap gage” was developed by the Greenfield Tap & Die Corporation in Greenfield, Massachusetts. It was used in World War II (1939-1945) for testing the diameter of a round or cylindrical surface such as that on a bullet.
Greenfield Tap and Die Corporation. Greenfield Tap and Die Corporation Limit snap gage with bullet. ca. 1940. Pocumtuck Valley Memorial Association, American Centuries. https://americancenturies.org/collection/m-50/. Accessed on November 20, 2024.
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