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 6110-01-535-5771
NSN 5925-01-438-8076
NSN 5915-01-167-0689
NSN 5835-00-678-6981
NSN 5920-01-159-3791
NSN 6110-01-128-5018
NSN 5935-01-335-8117
NSN 5925-01-354-4064
NSN 5998-00-521-2367
NSN 4140-00-547-8918
NSN 6650-01-119-0718
NSN 5935-01-122-9169