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 5999-01-145-6304
NSN 7035-01-535-6945
NSN 5975-01-039-8428
NSN 6650-01-316-1191
NSN 5930-01-485-5354
NSN 5950-01-594-6456
NSN 6135-01-608-2092
NSN 5965-01-348-8761
NSN 6130-01-275-3843
NSN 5910-01-388-2895
NSN 6610-01-521-0213
NSN 5915-00-025-1763