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 6220-00-008-5582
NSN 5920-01-415-6546
NSN 5930-01-429-7480
NSN 6650-00-499-7446
NSN 6650-00-401-7896
NSN 6220-00-523-9406
NSN 6320-01-229-6479
NSN 4140-01-145-4474
NSN 5935-01-545-4071
NSN 7035-00-335-7283
NSN 5915-01-175-3272
NSN 5935-00-584-4584