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 5910-01-124-9965
NSN 5935-01-117-2244
NSN 6220-01-594-3563
NSN 7035-01-423-8343
NSN 6685-01-328-9166
NSN 6150-01-021-5749
NSN 5985-00-279-1493
NSN 6220-01-316-2253
NSN 6150-01-097-9007
NSN 6650-00-848-9892
NSN 5935-00-558-4755
NSN 5855-00-446-5921