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 6110-01-350-2533
NSN 2925-01-617-6302
NSN 5920-00-526-0206
NSN 4140-01-355-8060
NSN 5990-00-967-6267
NSN 6145-01-170-3797
NSN 6685-00-409-4970
NSN 7035-00-890-7649
NSN 5905-01-050-8400
NSN 6150-01-639-8152
NSN 6650-01-014-5990
NSN 5935-00-958-5819