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 6610-01-514-7755
NSN 6610-00-430-5208
NSN 4140-01-457-8583
NSN 6135-01-120-9812
NSN 7035-00-238-3662
NSN 5996-00-024-0827
NSN 5975-01-555-9000
NSN 5990-01-425-2175
NSN 6135-00-473-6279
NSN 5960-00-258-9292
NSN 5935-01-510-3714
NSN 5935-01-432-7400