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 6150-00-673-4724
NSN 5935-01-140-7473
NSN 6620-01-102-0008
NSN 5915-01-487-3612
NSN 5895-00-767-5397
NSN 2925-00-486-0524
NSN 6685-00-316-5178
NSN 5960-00-201-5265
NSN 6650-00-059-6268
NSN 2925-00-221-4977
NSN 6650-00-992-4540
NSN 6145-01-634-0388