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 4140-01-439-2141
NSN 5985-01-517-9138
NSN 5985-01-381-6674
NSN 5930-01-372-2740
NSN 5835-01-192-4165
NSN 5920-01-513-5847
NSN 5960-00-409-9604
NSN 5920-01-423-7669
NSN 5925-01-497-1625
NSN 6135-01-326-2536
NSN 6645-01-483-5519
NSN 6650-01-553-2805