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 5935-00-823-0960
NSN 6685-01-442-1831
NSN 6135-01-167-0759
NSN 6105-00-647-3955
NSN 6240-01-411-6902
NSN 5835-00-825-2512
NSN 5920-01-647-5869
NSN 5985-01-653-5912
NSN 5915-01-469-6236
NSN 6620-01-530-3198
NSN 6650-01-146-5000
NSN 5990-01-529-7307