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 5999-01-205-0360
NSN 6130-01-541-4979
NSN 5895-00-716-2798
NSN 2925-00-328-2018
NSN 5945-00-533-8068
NSN 6220-01-003-9126
NSN 5855-01-122-9418
NSN 6150-00-004-4555
NSN 5910-01-227-5315
NSN 6685-00-455-9941
NSN 6130-00-904-6358
NSN 5910-01-633-2048