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 5930-01-187-6832
NSN 5915-01-643-8429
NSN 6150-01-104-2785
NSN 6105-00-205-0655
NSN 6105-00-731-4341
NSN 5920-01-627-6250
NSN 5965-01-633-8849
NSN 6645-01-430-2420
NSN 5935-01-540-1426
NSN 5945-01-541-7590
NSN 5930-00-497-4516
NSN 5930-00-830-1420