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 6685-01-291-4864
NSN 5945-01-599-2395
NSN 5965-00-807-9159
NSN 6320-00-456-0836
NSN 5975-00-183-7693
NSN 5975-01-181-6212
NSN 6650-01-442-7893
NSN 6105-01-393-7429
NSN 5935-00-132-6802
NSN 5935-01-166-0991
NSN 6610-00-911-0276
NSN 5925-01-470-0438