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 6105-00-208-7497
NSN 4140-01-055-9814
NSN 6105-01-277-6538
NSN 6685-01-265-7228
NSN 5920-01-551-1295
NSN 7035-01-057-1526
NSN 6320-01-116-3980
NSN 2925-00-265-7539
NSN 6130-00-004-4647
NSN 5945-01-542-4097
NSN 6145-01-374-3380
NSN 5990-01-591-8797