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 6620-01-149-2842
NSN 7035-01-600-2430
NSN 5950-01-358-9634
NSN 6320-01-350-5570
NSN 5930-00-294-7508
NSN 7035-01-435-4009
NSN 5915-01-630-9898
NSN 2925-00-234-0479
NSN 5965-01-441-0858
NSN 6105-01-632-9617
NSN 6130-01-564-2076
NSN 7035-01-145-5059