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 5935-00-434-3091
NSN 5935-01-104-5702
NSN 6320-01-195-5583
NSN 5945-00-276-9274
NSN 5960-00-470-5079
NSN 5985-01-266-6144
NSN 5960-00-040-9989
NSN 6645-01-357-0618
NSN 5935-01-004-0415
NSN 5895-00-947-7982
NSN 5990-00-223-5938
NSN 5895-01-273-0883