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 6650-01-178-5644
NSN 5895-01-033-0887
NSN 5905-01-066-5195
NSN 5965-01-616-4826
NSN 7035-01-026-0117
NSN 5920-01-509-8773
NSN 6110-00-159-8638
NSN 5930-00-607-0814
NSN 6220-01-237-2488
NSN 5996-01-351-5699
NSN 5945-01-012-9273
NSN 5855-01-381-7493