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 6105-01-100-3129
NSN 6110-01-218-3008
NSN 6220-01-020-8018
NSN 6650-01-328-0546
NSN 5835-01-601-4411
NSN 6220-00-526-7639
NSN 5925-01-397-4991
NSN 5975-01-223-5387
NSN 5985-01-311-6521
NSN 5975-00-839-8500
NSN 6320-01-516-3836
NSN 6135-01-543-1263