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 5930-01-020-7715
NSN 6650-01-481-3618
NSN 5935-01-106-8653
NSN 2925-01-243-0328
NSN 6105-01-011-5210
NSN 5945-01-467-2242
NSN 5925-01-394-1073
NSN 5935-00-833-6372
NSN 4140-01-257-2676
NSN 5925-01-501-8667
NSN 7035-01-106-3476
NSN 5910-01-529-4844