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 6130-00-521-1414
NSN 5985-01-579-3450
NSN 5945-00-614-7447
NSN 5855-01-610-9557
NSN 5920-00-763-4839
NSN 5930-00-753-6806
NSN 6135-01-487-0773
NSN 5910-01-571-6114
NSN 5935-01-493-8990
NSN 6320-00-500-4172
NSN 5999-00-964-8968
NSN 6685-01-379-6674