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 6685-00-114-1826
NSN 2925-00-633-7223
NSN 6150-01-624-2300
NSN 5915-01-212-9590
NSN 5985-00-537-4080
NSN 5990-01-633-9503
NSN 5990-00-359-9839
NSN 6145-01-146-5555
NSN 5925-01-597-8818
NSN 5960-01-004-5483
NSN 6650-00-927-3391
NSN 5998-01-269-0512