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 5835-01-642-4705
NSN 5930-00-986-1690
NSN 6240-01-544-6359
NSN 5945-01-489-1773
NSN 5965-00-682-3567
NSN 6150-00-179-9876
NSN 6620-01-470-3854
NSN 5985-00-314-0831
NSN 6135-01-375-6724
NSN 6150-01-370-9788
NSN 6220-00-417-3615
NSN 6150-01-357-6518