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 5999-01-407-9642
NSN 6650-01-505-6947
NSN 6105-01-425-7423
NSN 4140-00-141-0132
NSN 5965-01-082-1885
NSN 5950-01-488-5526
NSN 5996-00-924-4493
NSN 5905-01-143-0303
NSN 6650-00-503-9633
NSN 6685-01-444-5991
NSN 5999-01-494-6135
NSN 7035-01-238-9301