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 6110-01-229-8885
NSN 5895-01-634-0630
NSN 6650-00-828-6553
NSN 5945-01-234-2369
NSN 6650-01-406-0665
NSN 6150-01-400-4211
NSN 5965-00-617-5731
NSN 5965-00-622-5169
NSN 4140-01-145-8098
NSN 6135-01-176-2206
NSN 5998-01-634-0604
NSN 5855-01-072-4346