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 6645-01-172-6838
NSN 6650-01-107-0474
NSN 6650-01-418-6661
NSN 6105-01-645-9402
NSN 6110-01-468-5955
NSN 5920-01-206-3977
NSN 5965-01-523-5266
NSN 6220-00-442-6864
NSN 6320-01-450-5510
NSN 6145-01-612-6603
NSN 6135-01-512-8740
NSN 5965-00-841-7530