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 6110-01-545-4522
NSN 6240-01-610-6150
NSN 5905-01-497-1121
NSN 6130-00-277-7321
NSN 5910-01-214-3613
NSN 6105-01-502-8831
NSN 6620-01-397-4131
NSN 5935-00-036-3948
NSN 6320-00-831-2227
NSN 5975-00-828-9556
NSN 6220-01-270-1454
NSN 7035-01-572-4324