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 6130-01-431-0793
NSN 6130-00-375-6299
NSN 6240-01-609-5860
NSN 6650-01-197-4585
NSN 5950-01-634-0677
NSN 5925-01-028-2782
NSN 5925-01-242-9945
NSN 5935-00-546-3132
NSN 6320-01-155-8295
NSN 6135-01-309-8414
NSN 5965-01-142-8044
NSN 6620-01-185-6391