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 5990-01-463-2279
NSN 5915-01-607-7687
NSN 5925-00-081-5727
NSN 5999-01-092-3536
NSN 6610-01-618-2158
NSN 6320-01-592-6248
NSN 5975-01-215-1205
NSN 5990-00-105-9575
NSN 5925-01-464-4551
NSN 6620-01-068-4498
NSN 6130-01-608-1195
NSN 4140-01-074-2588