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 5930-01-359-7145
NSN 5905-00-112-0985
NSN 6240-01-225-9508
NSN 5965-00-756-0457
NSN 5835-01-604-7489
NSN 5950-00-343-1910
NSN 5960-00-987-1897
NSN 5990-00-529-8767
NSN 6150-01-658-3891
NSN 6135-00-990-1822
NSN 5985-01-445-8073
NSN 6650-00-872-0942