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 6150-00-894-1984
NSN 5935-01-485-4760
NSN 5895-01-316-6451
NSN 5975-01-469-3789
NSN 6130-01-508-7732
NSN 6320-01-236-9562
NSN 5996-00-993-8185
NSN 5930-00-339-3451
NSN 5915-01-478-0914
NSN 6105-01-040-0000
NSN 6150-00-153-0298
NSN 6130-01-177-4472