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 5905-01-273-2510
NSN 5998-01-078-2870
NSN 6645-00-932-1464
NSN 5855-01-089-2248
NSN 4140-00-288-9254
NSN 4140-01-593-0139
NSN 2925-01-519-3221
NSN 5960-00-118-2903
NSN 5965-01-408-9551
NSN 5895-01-628-1792
NSN 5996-00-964-5229
NSN 5935-00-708-8364