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 5930-01-657-3720
NSN 5950-01-474-9643
NSN 5985-01-190-3935
NSN 7035-00-631-3782
NSN 6130-01-583-7576
NSN 6110-00-271-9928
NSN 5930-00-833-0203
NSN 6150-01-417-2643
NSN 5910-00-362-6687
NSN 5935-01-513-0564
NSN 5930-00-251-8701
NSN 5996-01-091-3403