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 5920-00-187-0260
NSN 5925-01-343-8831
NSN 6320-01-158-2177
NSN 5975-01-157-3828
NSN 6240-01-160-7934
NSN 5985-01-350-2945
NSN 5910-01-055-5620
NSN 5905-00-814-9208
NSN 5935-00-936-8561
NSN 5960-01-526-3843
NSN 5960-01-460-0115
NSN 2925-00-422-5159