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 6130-01-360-0440
NSN 5996-01-126-2156
NSN 5905-00-837-2949
NSN 5920-00-294-0753
NSN 5895-01-608-8864
NSN 4140-01-279-9538
NSN 7035-00-782-7046
NSN 6320-01-501-7935
NSN 6650-01-523-3600
NSN 6320-01-206-6465
NSN 6240-00-480-1558
NSN 5945-01-204-9254