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 5925-01-395-7061
NSN 5915-01-019-8618
NSN 5855-00-149-0766
NSN 6105-00-281-3928
NSN 5985-00-195-9425
NSN 6240-00-117-9957
NSN 6620-00-542-1579
NSN 5925-01-188-0051
NSN 5990-00-258-0228
NSN 5935-00-115-3653
NSN 5910-01-432-1246
NSN 6135-01-150-6916