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 6240-01-384-8802
NSN 5920-00-999-7324
NSN 6685-00-170-9237
NSN 6620-00-019-8424
NSN 6130-01-484-9310
NSN 5930-01-043-1061
NSN 6110-01-477-3003
NSN 5935-01-016-4073
NSN 5998-01-398-3253
NSN 5915-00-131-6344
NSN 5910-01-147-3410
NSN 6130-01-624-0839