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 5910-00-927-5741
NSN 6145-01-162-0088
NSN 5910-00-762-1293
NSN 7035-01-620-5658
NSN 7035-01-145-5059
NSN 6220-01-500-9927
NSN 5945-01-593-8801
NSN 6130-01-555-9738
NSN 5920-01-095-7653
NSN 5996-01-488-4976
NSN 5998-00-837-7326
NSN 6130-00-860-5170