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 5930-01-018-3060
NSN 5835-00-904-6272
NSN 5910-01-181-1462
NSN 5945-01-037-7721
NSN 5999-01-080-3103
NSN 6105-01-160-8599
NSN 5935-01-599-9958
NSN 5999-01-087-8755
NSN 5935-01-462-1867
NSN 4140-01-500-9644
NSN 5915-01-336-1764
NSN 5960-01-518-4440