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 6685-01-520-3534
NSN 5945-01-381-5487
NSN 2925-01-254-3068
NSN 5950-01-154-9591
NSN 6220-01-357-1883
NSN 5998-01-391-1702
NSN 5920-00-871-1045
NSN 5925-01-344-0518
NSN 5935-01-502-8768
NSN 5996-00-761-4305
NSN 5965-00-752-5823
NSN 5998-01-209-0333