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 6650-00-283-0978
NSN 6130-00-843-0929
NSN 5990-01-216-0148
NSN 6645-00-491-0462
NSN 5975-01-576-1361
NSN 6320-01-116-3980
NSN 5975-01-322-8515
NSN 5990-00-683-1095
NSN 5975-01-227-0843
NSN 5945-01-507-3637
NSN 6610-00-133-7868
NSN 5935-00-424-2714