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 5945-00-860-9205
NSN 6110-01-518-4882
NSN 6650-01-514-8705
NSN 6135-01-108-6057
NSN 5996-01-055-6572
NSN 5855-01-535-7127
NSN 6220-01-094-1207
NSN 5895-00-248-7477
NSN 7035-01-445-3563
NSN 5985-01-058-6288
NSN 5915-00-707-2297
NSN 6610-00-132-3387