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 2925-00-569-2981
NSN 6610-01-140-3348
NSN 6650-01-201-1081
NSN 5950-00-114-2624
NSN 5990-01-246-2488
NSN 7035-00-163-6221
NSN 6240-01-440-9827
NSN 6145-01-584-7785
NSN 5996-01-129-2524
NSN 6150-01-557-7036
NSN 2925-01-214-5333
NSN 5935-00-307-7713