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 5950-01-441-3110
NSN 5910-01-323-4717
NSN 6650-00-443-4292
NSN 5925-00-379-0920
NSN 5835-00-612-1621
NSN 5905-01-415-1529
NSN 5915-01-216-2567
NSN 5990-01-223-6321
NSN 6610-01-653-8859
NSN 5920-01-047-2901
NSN 4140-01-467-1986
NSN 6240-00-829-4179