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 6240-00-462-0461
NSN 6220-01-206-7663
NSN 6130-01-004-8977
NSN 5975-01-442-5191
NSN 5999-01-459-8974
NSN 6650-00-035-9297
NSN 5935-01-526-3877
NSN 6610-01-252-1096
NSN 5910-01-021-5335
NSN 6135-00-444-1402
NSN 6105-00-079-9323
NSN 6645-01-244-4881