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 5930-01-374-7311
NSN 5935-01-243-0787
NSN 5965-01-159-2694
NSN 6105-01-388-4089
NSN 5945-01-527-6667
NSN 5999-01-587-1225
NSN 6110-01-445-8189
NSN 6110-01-649-1302
NSN 6620-00-992-5876
NSN 5998-00-491-8384
NSN 5835-01-182-1966
NSN 5855-01-492-3403