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 6650-01-488-6418
NSN 5999-01-350-3648
NSN 6320-01-578-6006
NSN 4140-01-596-5624
NSN 5990-00-274-3225
NSN 6130-01-197-7397
NSN 5905-00-433-3140
NSN 5930-00-206-0210
NSN 5999-01-623-6300
NSN 6620-01-116-3983
NSN 6105-00-500-7225
NSN 6220-01-507-9820