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 5965-01-198-3256
NSN 6240-00-260-0399
NSN 5990-00-351-5479
NSN 6620-01-042-2046
NSN 6130-00-991-5137
NSN 5998-01-319-7273
NSN 2925-01-600-2309
NSN 6150-00-572-3229
NSN 5990-01-481-8441
NSN 5855-01-392-1110
NSN 5945-00-243-8113
NSN 5935-00-109-7291