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 5835-01-457-7951
NSN 5950-01-513-1982
NSN 6135-01-286-9563
NSN 4140-01-258-1215
NSN 5990-01-512-9129
NSN 5915-00-256-2128
NSN 6240-01-543-3930
NSN 6135-01-010-0891
NSN 5985-01-173-6227
NSN 6110-00-575-9795
NSN 5975-01-485-1312
NSN 5925-01-495-1071