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 6220-01-478-6784
NSN 6650-01-302-9695
NSN 5925-01-429-4554
NSN 5990-01-338-2103
NSN 5920-01-141-6885
NSN 5960-01-614-8005
NSN 6220-00-610-9103
NSN 6220-01-502-9451
NSN 5905-01-202-9237
NSN 5990-00-251-0965
NSN 6130-00-149-0705
NSN 6150-01-308-8871