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 6685-01-325-6756
NSN 7035-00-117-0418
NSN 5935-01-352-8537
NSN 5999-01-528-2350
NSN 6320-01-310-8068
NSN 4140-00-187-6086
NSN 5910-00-925-2412
NSN 5930-01-361-9027
NSN 6320-00-070-4544
NSN 6240-01-175-3877
NSN 5855-00-221-9435
NSN 5945-00-282-3181