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 6610-00-040-4124
NSN 5905-01-108-3737
NSN 6130-01-599-0884
NSN 5920-00-585-0104
NSN 5935-01-092-0033
NSN 5930-00-854-2600
NSN 4140-00-640-6811
NSN 5990-00-814-7990
NSN 5925-01-432-2731
NSN 5996-01-119-2720
NSN 5935-00-165-8532
NSN 2925-00-343-3235