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 2925-01-491-0224
NSN 6685-00-523-8473
NSN 5945-01-461-9291
NSN 6130-01-569-4648
NSN 5975-00-380-5753
NSN 5935-01-186-9732
NSN 6110-01-020-9150
NSN 5835-01-502-9228
NSN 5930-00-107-4376
NSN 6320-00-284-1524
NSN 5855-01-178-8732
NSN 5960-01-381-2478