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 6650-01-129-6087
NSN 6130-00-905-5618
NSN 4140-01-430-2335
NSN 5895-00-185-4543
NSN 4140-01-412-3933
NSN 6610-01-476-7412
NSN 6650-01-202-9143
NSN 5999-01-504-0421
NSN 5990-00-230-5352
NSN 6610-01-055-4147
NSN 6145-01-244-8758
NSN 5855-01-096-9294