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 6110-01-450-8082
NSN 6320-01-119-3935
NSN 5920-00-075-5726
NSN 6130-01-647-7251
NSN 7035-01-448-4740
NSN 4140-01-113-0272
NSN 6620-01-431-9176
NSN 5965-00-529-0602
NSN 5905-00-274-3789
NSN 5855-00-132-1007
NSN 5915-01-599-8846
NSN 5999-01-213-9168