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 6610-01-023-6073
NSN 6105-00-488-1519
NSN 5998-01-478-0299
NSN 4140-01-442-8862
NSN 5910-01-064-1576
NSN 4140-01-137-3264
NSN 6620-01-462-0001
NSN 6650-01-372-1877
NSN 5960-00-087-6636
NSN 6645-01-128-0895
NSN 6685-01-328-8051
NSN 6105-00-927-6009