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 5915-01-504-6581
NSN 5965-01-535-5789
NSN 6110-01-284-0318
NSN 6620-00-189-0967
NSN 6220-01-305-1223
NSN 6135-00-593-6831
NSN 7035-01-137-6206
NSN 6620-01-163-3329
NSN 7035-01-364-0286
NSN 6645-00-701-4606
NSN 6610-01-156-0810
NSN 6135-01-154-3526