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 5905-00-597-6081
NSN 6145-01-202-9555
NSN 4140-01-106-2283
NSN 5945-01-487-8536
NSN 6620-01-412-0938
NSN 5930-01-590-7487
NSN 6110-01-418-2578
NSN 5910-00-810-5141
NSN 5855-01-319-9757
NSN 5895-01-649-3713
NSN 6110-00-288-4179
NSN 5990-01-512-9129