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 5935-01-432-0503
NSN 6220-01-145-0198
NSN 6320-01-021-6633
NSN 7035-01-138-5781
NSN 4140-00-121-6746
NSN 5835-00-905-7165
NSN 6150-00-518-1402
NSN 5945-00-330-5000
NSN 5975-00-401-3479
NSN 5975-01-040-2894
NSN 6105-00-847-8199
NSN 5905-00-972-4907