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 5990-00-518-0684
NSN 6240-01-649-6937
NSN 6130-00-895-6966
NSN 5945-01-327-0280
NSN 5999-01-206-4657
NSN 5990-00-518-0684
NSN 6645-01-147-9265
NSN 6240-01-401-5340
NSN 7035-01-555-8793
NSN 5905-00-357-1579
NSN 5945-00-843-2922
NSN 7035-01-630-2123