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 6150-01-460-4528
NSN 5975-01-646-0874
NSN 6110-00-422-4973
NSN 7035-01-406-5232
NSN 4140-00-197-9712
NSN 6240-01-452-0379
NSN 5965-00-055-8013
NSN 6685-00-434-4502
NSN 5935-01-507-8873
NSN 6110-00-014-8160
NSN 6320-00-456-0836
NSN 5925-01-500-1352