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 6145-01-163-0664
NSN 6240-00-660-8849
NSN 6645-01-123-6661
NSN 5960-01-122-7310
NSN 5895-01-317-7778
NSN 5950-01-278-2607
NSN 5935-01-632-0001
NSN 6650-00-323-8150
NSN 5975-00-552-1764
NSN 6610-01-429-7267
NSN 4140-01-579-9513
NSN 6320-01-450-7083