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 5998-01-044-9827
NSN 6145-01-598-9912
NSN 5935-01-024-0520
NSN 6110-00-058-6732
NSN 6620-00-317-7820
NSN 5895-01-293-9704
NSN 7035-00-803-3056
NSN 5990-01-514-8708
NSN 5975-01-556-4150
NSN 4140-01-340-9198
NSN 5905-01-382-1034
NSN 6145-00-884-8112