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 5920-01-131-4374
NSN 5910-01-370-1888
NSN 5920-01-518-3027
NSN 5990-01-591-8797
NSN 6150-01-502-0202
NSN 5935-00-466-9825
NSN 7035-01-562-1904
NSN 6135-00-574-1204
NSN 5905-01-593-2813
NSN 5925-00-631-1078
NSN 6145-01-600-8532
NSN 6145-00-559-7774