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 5960-00-679-3944
NSN 6610-01-308-4747
NSN 5945-00-832-4128
NSN 5920-01-511-1963
NSN 6135-01-513-3581
NSN 6130-01-129-5997
NSN 2925-01-327-3069
NSN 6685-00-930-2771
NSN 6645-01-595-7659
NSN 6135-01-622-1296
NSN 5930-01-037-1338
NSN 6105-01-386-1529