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 6145-01-063-2482
NSN 5855-01-657-7657
NSN 5915-01-582-5096
NSN 6620-01-519-2628
NSN 6135-00-170-8819
NSN 6150-01-542-6924
NSN 7035-01-143-3573
NSN 5990-01-024-9659
NSN 5905-00-547-7539
NSN 4140-00-888-9836
NSN 6105-00-833-8045
NSN 5910-00-872-6567