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 5915-01-652-1173
NSN 6130-00-387-2051
NSN 6645-01-062-0905
NSN 5985-01-545-1993
NSN 6320-00-360-1744
NSN 6150-01-234-6749
NSN 5930-01-386-3068
NSN 5999-01-316-7414
NSN 6105-01-522-4191
NSN 5975-01-411-4728
NSN 6650-01-134-6186
NSN 6150-00-951-3420