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 2925-01-602-1975
NSN 6110-00-100-4775
NSN 6610-01-605-2451
NSN 6110-00-813-8632
NSN 5835-01-449-7511
NSN 5835-01-229-6964
NSN 5835-01-163-4215
NSN 5935-01-518-7923
NSN 5920-00-717-6839
NSN 2925-00-096-5526
NSN 6105-01-228-7317
NSN 5998-00-852-2873