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 5910-00-446-9131
NSN 2925-00-764-0167
NSN 5960-01-553-4557
NSN 5985-01-634-0635
NSN 5975-01-241-6393
NSN 5965-01-395-0104
NSN 5835-01-336-1153
NSN 6320-00-456-0836
NSN 6240-00-446-7796
NSN 2925-00-246-3077
NSN 6105-01-623-3590
NSN 5965-01-386-2988