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 7035-01-358-8361
NSN 5975-01-629-9756
NSN 6320-01-624-0193
NSN 5935-01-265-0740
NSN 5996-01-139-0303
NSN 7035-01-285-7413
NSN 5950-01-070-1146
NSN 6220-00-760-9199
NSN 5960-00-307-9919
NSN 5930-01-445-5408
NSN 6650-01-628-0154
NSN 7035-00-188-6674