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 5855-01-573-0761
NSN 5950-01-109-1871
NSN 5930-01-500-7160
NSN 5915-00-893-6988
NSN 5945-01-022-8453
NSN 5895-00-253-0799
NSN 5905-00-752-3361
NSN 6145-01-338-5671
NSN 5930-01-147-6035
NSN 5935-01-107-4126
NSN 5920-01-238-9319
NSN 4140-00-804-5667