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 6650-01-548-7915
NSN 4140-00-019-4686
NSN 5975-01-610-1566
NSN 6130-01-023-5737
NSN 5985-00-034-5268
NSN 5930-00-232-4777
NSN 6610-01-105-3174
NSN 5985-01-454-6201
NSN 6650-00-276-9838
NSN 5945-01-340-3886
NSN 6650-01-233-1484
NSN 5990-01-525-2250