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 5945-01-216-7953
NSN 5990-00-326-2172
NSN 6135-00-583-3966
NSN 5960-01-429-5897
NSN 5895-01-334-9431
NSN 6650-01-588-4687
NSN 5999-01-502-6706
NSN 5855-01-147-4785
NSN 5990-00-229-4647
NSN 5999-01-624-6159
NSN 6135-01-086-8167
NSN 5925-00-185-4020