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 6320-01-415-0953
NSN 5855-01-242-8428
NSN 5965-01-346-4929
NSN 5915-01-068-0818
NSN 5990-00-249-7887
NSN 5925-01-117-6277
NSN 5925-01-478-9637
NSN 6105-00-514-0884
NSN 6685-01-596-5391
NSN 5975-00-518-1733
NSN 6650-01-234-1896
NSN 6320-01-627-1594