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 2925-00-099-4030
NSN 6610-00-139-1105
NSN 5925-00-399-1120
NSN 5920-01-328-5310
NSN 6105-01-005-1915
NSN 5950-01-634-0677
NSN 6320-01-541-7585
NSN 6620-00-531-2974
NSN 5855-00-149-0766
NSN 5965-01-530-6565
NSN 6135-00-235-1938
NSN 6150-00-958-9553