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These special measuring tools produced by Greenfield Tap & Die Corporation (GTD) were critical in achieving "interchangeable parts" used in machinery. The gages accurately sized holes and threads which were held to close tolerances to achieve interchangeability. The quality of gages that could measure a piece of machinery as a "go" or "no-go" machine component, gave America a distinct advantage in World War II (WWII). Historians agree that World War II (WWII) was ultimately won on the home front. Greenfield Massachusetts industrial workers were so essential that they were deferred from the draft, and Greenfield was protected by an anti- aircraft battery, able to shoot down German bombers.

 

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Go and No-Go Thread and Plug Gages made by Greenfield Tap and Die Corporation during WWII

creator   Greenfield Tap and Die Corporation
date   1941-1945
location   Greenfield, Massachusetts
height   7.0"
width   1.0"
process/materials   ceramic
item type   Tools/Mechanical Tools & Equipment
accession #   #M.49


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See Also...

Framed photograph of Greenfield Tap and Die Corporation operator during WWII

"GTD Makes John Grant's Invention Known Around World" article from Greenfield Recorder-Gazette newspaper

"America's Entire Strength Is Now Concentrated on Our War Effort" ad for GTD from Greenfield Recorder-Gazette newspaper

Whitworth Hand Tap & Die set made by Greenfield Tap and Die Corporation during WWII


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