National Stock Number:
5340-00-470-6644
Federal Supply Class:
5340
National Item Identification Number:
004706644
Description:
PLUG,EXPANSION
Detail:
A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
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