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 6150-01-147-4604
NSN 6320-01-616-0843
NSN 5990-01-440-7135
NSN 4140-01-529-7988
NSN 6650-01-132-6860
NSN 5999-01-149-3583
NSN 5855-01-485-3429
NSN 6130-00-155-2490
NSN 5975-01-507-4771
NSN 5915-00-939-2350
NSN 6110-01-124-6864
NSN 5960-00-236-3980