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 5935-01-602-5045
NSN 6110-01-293-9091
NSN 5905-00-984-0953
NSN 4140-01-231-9419
NSN 5960-01-010-3083
NSN 5915-01-044-5260
NSN 5935-01-298-2006
NSN 5960-01-089-8155
NSN 5930-00-812-2652
NSN 6610-01-075-8755
NSN 6650-00-137-0283
NSN 4140-00-422-5101