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 5990-01-311-7491
NSN 6645-01-461-7704
NSN 6110-01-485-6853
NSN 5925-01-025-7008
NSN 6650-01-207-0829
NSN 5935-01-325-3548
NSN 6145-01-573-5891
NSN 6110-00-231-0776
NSN 6685-00-547-6218
NSN 6110-01-484-3200
NSN 7035-01-137-6206
NSN 6135-00-062-5080