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 4140-00-205-0853
NSN 6685-00-016-2340
NSN 5930-00-518-1642
NSN 5945-00-163-6975
NSN 5925-01-308-0581
NSN 5950-00-034-1274
NSN 6650-01-329-3055
NSN 5835-01-508-2528
NSN 6105-01-141-6912
NSN 5985-00-161-2723
NSN 5960-00-860-7709
NSN 2925-01-068-3844