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 5965-01-394-1542
NSN 5990-01-575-3275
NSN 6130-01-629-7468
NSN 6620-01-132-5190
NSN 5960-00-675-3439
NSN 4140-01-004-9177
NSN 5990-01-586-2475
NSN 6220-00-325-2740
NSN 6685-01-026-9326
NSN 5930-00-914-6785
NSN 5960-01-180-8000
NSN 5915-01-024-8200