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 5895-01-623-5818
NSN 5915-00-862-6706
NSN 7035-01-352-6235
NSN 5925-00-077-2837
NSN 5998-01-169-8936
NSN 5915-00-164-5120
NSN 6240-00-016-7794
NSN 6620-01-541-4465
NSN 6320-00-937-5625
NSN 6610-01-023-6073
NSN 6105-01-298-0350
NSN 4140-01-423-1005