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 6240-01-319-8145
NSN 5975-00-166-5800
NSN 4140-01-486-2839
NSN 6620-00-580-3499
NSN 6110-01-649-1302
NSN 5925-00-410-7560
NSN 2925-00-246-3077
NSN 5915-01-647-4236
NSN 5855-00-252-5743
NSN 6105-01-435-8427
NSN 6145-01-025-1822
NSN 5915-01-282-0993