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 5920-00-584-4592
NSN 5985-01-104-4324
NSN 6220-00-988-5311
NSN 2925-01-143-1996
NSN 5895-00-290-6501
NSN 5945-00-999-5198
NSN 5920-00-777-1493
NSN 5910-00-857-0086
NSN 6110-01-399-1176
NSN 5990-00-658-3953
NSN 6650-00-831-5532
NSN 5920-01-450-4248