Hays Army Ammunition Plant, Former military ammunition facility in Hays, Pittsburgh, United States.
Hays Army Ammunition Plant was an industrial facility in Hays near Pittsburgh that manufactured ammunition shells and breechblocks for military use. Production occurred through cold extrusion methods across multiple buildings spread across a large area in Pennsylvania.
The facility opened in 1942 and produced naval ammunition during World War II under the management of Mesta Machine Company. Operations continued until 1970, serving ammunition needs through the Vietnam War era.
The facility represented American industrial capacity during three major conflicts, employing thousands of workers from the Pittsburgh region between 1942 and 1970.
The site is no longer operational and not open to the public. Visitors can view the area from a distance or learn more about its history through local museums and historical archives in the region.
This was the only U.S. Army ammunition plant that used cold extrusion technology to manufacture military components. This manufacturing method allowed faster and more efficient production compared to traditional techniques.
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