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 5945-01-145-3179
NSN 5985-00-758-8911
NSN 5999-01-509-7799
NSN 5985-01-592-5565
NSN 6135-01-520-8392
NSN 5835-00-761-5615
NSN 5855-00-221-9435
NSN 5930-01-495-7229
NSN 6150-00-490-9346
NSN 5930-00-492-2561
NSN 5975-01-226-1097
NSN 5990-01-485-0260