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 6620-00-248-9513
NSN 6650-00-586-3726
NSN 6320-01-527-0211
NSN 5915-01-651-9628
NSN 6645-01-414-8806
NSN 5920-00-717-6839
NSN 4140-00-922-8875
NSN 4140-01-591-0599
NSN 2925-01-508-4138
NSN 7035-00-946-2642
NSN 5905-01-606-3348
NSN 5990-01-625-0855