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 5930-00-355-4589
NSN 5935-00-235-2545
NSN 5855-00-138-2386
NSN 5990-01-369-2764
NSN 5855-01-589-7273
NSN 6620-01-214-7520
NSN 5960-01-323-6432
NSN 5935-01-537-0095
NSN 5975-00-719-9793
NSN 5985-00-535-9943
NSN 6220-00-711-3579
NSN 5895-01-367-9483