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 5925-01-137-2234
NSN 5920-00-962-9874
NSN 5935-01-472-6904
NSN 5915-01-120-0909
NSN 5930-01-580-0612
NSN 4140-01-428-9426
NSN 5935-00-817-3416
NSN 6320-01-106-4414
NSN 7035-00-421-8710
NSN 7035-01-383-9357
NSN 5905-01-277-4966
NSN 6620-01-608-8548