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 5920-01-510-3933
NSN 2925-01-571-9985
NSN 5998-00-961-9553
NSN 7035-01-106-3476
NSN 5990-01-239-5878
NSN 2925-00-185-1618
NSN 6130-01-265-1021
NSN 5925-00-857-4850
NSN 6150-01-453-1163
NSN 5925-01-182-4747
NSN 5965-00-768-4366
NSN 5930-01-141-7018