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 5945-00-753-7563
NSN 7035-01-472-1999
NSN 5915-01-372-4818
NSN 5930-01-037-5406
NSN 5990-01-625-5923
NSN 5975-01-419-2696
NSN 6220-01-007-6094
NSN 5920-01-547-8757
NSN 5835-01-475-5714
NSN 4140-00-476-7211
NSN 7035-00-153-3826
NSN 5835-01-364-6830