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 6620-01-296-9803
NSN 5990-00-466-2952
NSN 5920-01-285-4703
NSN 5996-00-332-2438
NSN 6145-00-144-0918
NSN 5985-01-141-7059
NSN 5996-00-925-1953
NSN 5920-01-025-9381
NSN 5985-00-051-3118
NSN 5930-01-581-9245
NSN 5835-01-512-4834
NSN 5920-00-735-0783