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 6110-00-778-3558
NSN 6135-00-170-8819
NSN 5925-00-736-0425
NSN 5945-00-188-8954
NSN 6645-00-634-9317
NSN 5950-01-514-6275
NSN 6150-01-469-0423
NSN 6650-00-575-0770
NSN 5915-01-119-9392
NSN 5915-01-093-8644
NSN 5920-01-503-7235
NSN 5925-01-020-7706