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 5920-01-310-6027
NSN 6105-01-175-1286
NSN 5990-01-341-5735
NSN 6135-01-252-0315
NSN 5996-01-615-6264
NSN 5985-01-125-5336
NSN 7035-01-459-5293
NSN 6135-00-221-4720
NSN 6220-01-178-0171
NSN 5855-01-632-5485
NSN 6320-01-052-2118
NSN 5915-01-633-9845