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 5855-00-149-0766
NSN 5920-01-482-8757
NSN 6135-01-510-9986
NSN 6620-01-340-1503
NSN 6320-00-098-2858
NSN 5998-01-269-8157
NSN 5905-01-142-7751
NSN 5835-01-302-6844
NSN 5945-01-149-1828
NSN 5855-01-236-9645
NSN 6130-00-452-1486
NSN 5905-01-042-2541