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 5855-01-506-6767
NSN 5999-01-656-2487
NSN 6105-01-491-9991
NSN 6320-01-317-3663
NSN 6145-01-459-0962
NSN 6130-01-452-1437
NSN 5965-00-884-2344
NSN 5998-01-170-0101
NSN 5960-00-998-4324
NSN 6135-00-906-0984
NSN 6650-01-226-4819
NSN 5895-01-268-2031