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 6685-01-103-3143
NSN 5910-00-247-9489
NSN 6130-00-996-8029
NSN 6145-00-926-2370
NSN 5835-01-270-7899
NSN 5998-01-459-2545
NSN 6105-01-581-5495
NSN 5996-01-444-4547
NSN 5925-01-493-6489
NSN 6130-00-117-6232
NSN 5920-00-455-9743
NSN 2925-01-471-4912