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 5990-00-113-6137
NSN 4140-01-264-4352
NSN 5960-01-098-8437
NSN 6620-01-111-9064
NSN 6130-00-456-0206
NSN 5920-00-518-1793
NSN 6685-01-516-3397
NSN 5999-00-115-1084
NSN 6150-00-262-4977
NSN 6240-01-077-6446
NSN 6320-01-291-2023
NSN 6110-01-274-8039