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 6650-00-161-4122
NSN 6135-00-643-4843
NSN 6645-00-420-5072
NSN 5950-00-248-2324
NSN 6135-00-027-3914
NSN 6610-00-239-2397
NSN 5855-01-620-1938
NSN 5996-00-701-5819
NSN 5945-01-061-7659
NSN 5999-00-233-6366
NSN 5905-01-087-3174
NSN 5925-01-374-9249