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 5990-01-309-3740
NSN 5925-01-534-4866
NSN 6240-00-141-6143
NSN 5925-00-275-0380
NSN 6610-01-067-6591
NSN 6650-01-229-7500
NSN 6685-00-945-7340
NSN 5855-00-167-7893
NSN 5855-01-156-0417
NSN 5835-01-386-4027
NSN 5920-00-816-7535
NSN 6610-01-342-5952