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 6645-00-542-1206
NSN 5935-01-204-7295
NSN 5975-01-520-5660
NSN 6150-00-027-9279
NSN 5975-01-655-0696
NSN 6130-01-537-5782
NSN 5965-01-546-6879
NSN 5975-01-220-2949
NSN 5935-00-462-3708
NSN 6320-01-119-3935
NSN 5920-01-249-6664
NSN 6145-00-824-2517