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 5925-00-152-9399
NSN 6650-01-192-8784
NSN 6135-01-442-7275
NSN 6685-01-631-8380
NSN 5905-00-232-3984
NSN 5950-01-433-2289
NSN 5835-01-362-0305
NSN 5910-01-395-8249
NSN 5960-00-960-6805
NSN 6620-01-528-4717
NSN 5855-01-434-1041
NSN 5998-00-098-8681