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 5998-00-185-6029
NSN 2925-00-925-0545
NSN 5945-00-783-1050
NSN 6685-01-058-8066
NSN 6220-00-039-6348
NSN 5996-00-060-7309
NSN 5835-00-155-1379
NSN 6650-00-658-9627
NSN 5835-01-412-0344
NSN 5855-00-466-2309
NSN 5945-01-483-1316
NSN 2925-01-550-0177