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 7035-00-797-2635
NSN 5905-01-605-1569
NSN 5945-01-447-3456
NSN 6650-01-279-2055
NSN 5975-01-580-0721
NSN 5935-01-119-8465
NSN 6150-01-508-4207
NSN 6145-00-181-9622
NSN 5960-00-204-7506
NSN 5920-01-634-0250
NSN 6110-01-178-9231
NSN 6150-01-093-1172