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 5945-01-399-5980
NSN 5996-01-423-8452
NSN 6620-00-079-4615
NSN 5930-00-719-5258
NSN 6240-00-146-9322
NSN 5950-01-363-2147
NSN 5960-01-537-6611
NSN 6650-01-446-1160
NSN 6240-00-334-6766
NSN 6105-00-113-6292
NSN 6320-01-054-3046
NSN 6320-00-036-3688