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 6320-00-295-2854
NSN 4140-00-114-5225
NSN 6145-01-495-1410
NSN 5910-00-532-2478
NSN 5996-01-020-5759
NSN 5925-00-204-8199
NSN 6620-01-128-3053
NSN 6610-01-597-2911
NSN 6220-01-408-3017
NSN 5895-01-599-1561
NSN 5930-01-322-2399
NSN 5999-01-407-2153