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 5990-00-968-4401
NSN 5930-00-482-0357
NSN 5999-01-502-5532
NSN 6150-00-196-7322
NSN 7035-01-411-3611
NSN 5999-01-357-5606
NSN 5895-01-085-7295
NSN 6650-00-992-4540
NSN 4140-01-203-8713
NSN 5999-01-033-7971
NSN 5950-00-949-9619
NSN 5910-01-256-1823