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 6650-00-762-4645
NSN 5945-00-259-5065
NSN 6150-01-596-8335
NSN 6610-01-283-5629
NSN 5950-00-909-9489
NSN 6620-00-079-0311
NSN 5920-01-278-0600
NSN 5960-01-628-2760
NSN 5895-00-292-2872
NSN 5960-01-597-9591
NSN 6650-01-236-4479
NSN 6620-00-273-8735