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 5835-00-484-1529
NSN 4140-00-459-1564
NSN 6240-00-916-4217
NSN 4140-01-655-9389
NSN 5945-01-352-5852
NSN 6610-01-432-8459
NSN 5835-01-209-6410
NSN 5999-01-132-0764
NSN 6650-01-423-1348
NSN 5960-01-425-1454
NSN 5915-01-481-5042
NSN 5920-01-432-1328