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 6145-00-663-6133
NSN 6105-00-291-0154
NSN 5965-01-222-1420
NSN 6105-00-393-2489
NSN 5910-01-658-7939
NSN 6685-01-385-4180
NSN 7035-01-106-3476
NSN 5935-01-502-8998
NSN 5920-00-339-0338
NSN 5920-01-409-2830
NSN 6685-01-499-8896
NSN 6145-01-388-0759