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 5985-00-030-9414
NSN 5999-01-110-0673
NSN 6320-00-925-0558
NSN 6145-00-826-3995
NSN 5945-01-434-7249
NSN 6105-01-118-8537
NSN 6220-00-147-7064
NSN 6685-00-235-7248
NSN 7035-00-870-0290
NSN 5985-00-268-7318
NSN 6150-01-484-9908
NSN 6220-00-200-7888