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 6220-00-869-2454
NSN 5855-00-174-3482
NSN 5999-01-271-0864
NSN 6685-01-027-7061
NSN 5905-00-364-7790
NSN 5985-01-460-9506
NSN 5999-01-062-2109
NSN 6320-01-207-9038
NSN 6150-01-432-4850
NSN 6610-01-010-3915
NSN 5950-01-268-1573
NSN 5935-01-428-4201