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 6135-01-142-2417
NSN 5975-01-293-0750
NSN 5990-00-288-1820
NSN 5996-01-417-2874
NSN 5990-01-365-6016
NSN 5835-01-641-0073
NSN 6610-01-487-6843
NSN 5990-00-068-4324
NSN 5985-00-615-4949
NSN 6105-01-649-3569
NSN 5975-00-327-8586
NSN 5835-01-581-9433