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 5985-01-328-1350
NSN 6135-00-958-7981
NSN 5996-01-591-8882
NSN 5855-01-180-5369
NSN 6240-01-367-5756
NSN 6620-01-365-1499
NSN 6610-00-419-0181
NSN 7035-01-368-4801
NSN 6105-01-306-8557
NSN 6135-01-476-4697
NSN 5855-01-575-4813
NSN 6130-01-543-9727