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 6145-01-099-9118
NSN 5985-01-166-9332
NSN 4140-01-371-0327
NSN 5915-01-503-2305
NSN 5996-01-211-8067
NSN 5895-00-733-9278
NSN 5910-01-617-0341
NSN 5835-00-510-0890
NSN 5910-01-334-8312
NSN 4140-00-727-3731
NSN 5930-01-254-6613
NSN 4140-01-602-3741