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.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 4140-00-762-9384
NSN 5998-01-563-4833
NSN 6105-00-898-5072
NSN 5935-01-122-6713
NSN 5999-00-358-1933
NSN 5985-01-202-5030
NSN 5895-01-013-8096
NSN 5930-00-140-9309
NSN 5855-01-385-6586
NSN 2925-00-149-0760
NSN 5998-00-933-1761
NSN 5925-00-045-8091