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 6650-01-278-2151
NSN 5998-01-238-4820
NSN 6650-01-556-6941
NSN 2925-01-157-9204
NSN 5935-01-429-9941
NSN 6685-01-371-0084
NSN 5999-01-058-6955
NSN 5950-00-001-6990
NSN 5905-00-466-1251
NSN 4140-01-023-1537
NSN 5930-00-350-6740
NSN 6320-00-636-0922