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 5998-00-633-0572
NSN 5905-01-487-4374
NSN 5998-01-642-0448
NSN 5999-01-364-0876
NSN 7035-01-657-7183
NSN 6220-01-634-0660
NSN 6105-00-286-5382
NSN 7035-00-455-7666
NSN 5965-01-145-3732
NSN 5998-01-361-5177
NSN 5920-01-434-2542
NSN 5965-01-182-3384