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 5996-01-055-6207
NSN 5960-00-021-5618
NSN 5895-01-437-7171
NSN 6620-00-405-4621
NSN 5895-00-707-6663
NSN 5975-01-351-2084
NSN 5990-01-168-6797
NSN 6685-01-187-1550
NSN 5915-01-604-9868
NSN 5998-00-884-2429
NSN 6685-01-408-0098
NSN 5935-00-683-7894