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 5935-01-572-1206
NSN 6135-01-512-8740
NSN 6240-01-114-8099
NSN 5935-01-643-1864
NSN 5990-01-317-5743
NSN 5960-01-567-1096
NSN 5895-01-543-5246
NSN 5950-01-443-3321
NSN 6620-00-527-6523
NSN 7035-00-252-7467
NSN 5960-00-090-2991
NSN 6240-01-463-8276