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 5925-00-985-0908
NSN 5965-00-167-7659
NSN 6320-01-092-4101
NSN 5945-01-493-2889
NSN 6650-00-900-0049
NSN 5999-01-066-2281
NSN 6650-01-633-6872
NSN 5985-01-383-4930
NSN 5835-00-453-1969
NSN 5990-00-014-2310
NSN 5950-01-358-0246
NSN 6240-01-029-3701