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 4140-01-170-4479
NSN 5835-00-544-0298
NSN 6220-01-441-2249
NSN 5965-01-434-4095
NSN 5905-00-787-0566
NSN 5975-01-022-5128
NSN 5910-01-160-6988
NSN 5915-01-224-5594
NSN 5935-01-485-2315
NSN 5835-01-657-0245
NSN 6620-01-381-6225
NSN 6105-00-106-0395