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 5915-00-225-9506
NSN 5910-01-641-5886
NSN 5915-00-197-8610
NSN 5990-01-316-6344
NSN 5935-01-225-9881
NSN 5998-01-562-2940
NSN 6130-00-846-4961
NSN 6130-00-288-1886
NSN 5990-01-576-4383
NSN 5835-01-140-6452
NSN 2925-00-167-6762
NSN 5930-01-564-8975