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 6110-01-580-6415
NSN 5960-01-084-7381
NSN 5930-01-376-9291
NSN 6645-01-025-1002
NSN 5855-01-077-6264
NSN 4140-01-037-5387
NSN 5935-01-377-2601
NSN 5998-01-621-9801
NSN 5975-01-429-8609
NSN 5920-01-246-0092
NSN 5855-01-600-0003
NSN 6320-01-211-6578