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 6145-01-406-3387
NSN 5835-01-229-6964
NSN 5905-01-467-5185
NSN 5835-00-233-6327
NSN 6650-01-127-2835
NSN 6650-01-062-8105
NSN 6135-01-355-8917
NSN 6220-01-480-6681
NSN 4140-00-715-7747
NSN 6135-01-604-3956
NSN 6105-00-431-9995
NSN 5965-01-193-5221