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 5925-01-209-5566
NSN 6620-01-195-7817
NSN 5930-01-510-3913
NSN 7035-01-657-3449
NSN 6220-00-686-5328
NSN 5960-00-669-9793
NSN 5835-01-155-8301
NSN 6220-01-182-6089
NSN 6110-01-633-7705
NSN 6650-01-046-7795
NSN 5895-01-462-6022
NSN 6135-01-303-0295