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 6145-01-258-6101
NSN 7035-01-182-1086
NSN 6685-01-267-5726
NSN 5975-00-573-9227
NSN 6130-01-208-3938
NSN 6650-01-524-6791
NSN 6610-00-443-8910
NSN 5990-01-449-7090
NSN 6685-01-605-2497
NSN 4140-01-224-8715
NSN 5930-00-469-7514
NSN 6620-00-360-1379