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 5975-01-590-6535
NSN 6150-01-436-8352
NSN 5905-01-386-2646
NSN 5855-01-393-8749
NSN 6220-00-929-8612
NSN 5990-01-459-9533
NSN 5905-01-124-8461
NSN 2925-00-017-9807
NSN 5855-01-495-2670
NSN 6685-00-873-2576
NSN 5965-01-612-8098
NSN 5915-00-125-7095