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 5920-00-870-8294
NSN 6685-00-822-6923
NSN 6135-01-214-6441
NSN 6610-01-323-0901
NSN 6650-01-022-5181
NSN 5915-01-433-2128
NSN 6135-01-643-5809
NSN 6620-00-035-5813
NSN 6135-00-170-8819
NSN 6110-00-854-2249
NSN 6105-00-404-7656
NSN 5930-01-422-2688