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 6620-01-338-8945
NSN 5925-01-058-4664
NSN 5930-00-218-1031
NSN 6650-01-047-9642
NSN 5975-01-230-1496
NSN 5915-01-040-8164
NSN 5996-00-846-3300
NSN 5910-00-961-6241
NSN 5996-01-542-5137
NSN 4140-01-502-8290
NSN 5915-00-901-3754
NSN 6105-01-031-6588