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In 1934, the Threadwell Tap & Die Company was formed and located on Arch Street in Greenfield, Massachusetts. The company developed and patented a new method of thread cutting and restoring damaged threads. This Tap & Die set, circa 1940's, includes fine and coarse thread cutting tools that range from 1/4 to 1/2 inch sizes, based on the U. S. thread standard established in the early 20th century. During World War II (WWII) Threadwell manufactured taps in great quantities. When German bombers leveled the English city of Coventry and its threading tool industries, Threadwell became the major supplier of British standard threading tools. It also made cutting tools used in rifling the Garand rifle, .30 and .50 caliber machine guns barrels manufactured by the Springfield Armory. Threadwell was the third largest employer in Greenfield during WWII with nearly 400 employees.