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 5950-00-099-9612
NSN 6620-01-029-3705
NSN 5835-01-412-0344
NSN 6620-00-877-3266
NSN 6135-00-243-8330
NSN 5950-00-829-6658
NSN 6220-01-298-1499
NSN 6150-01-151-6293
NSN 4140-01-341-8265
NSN 5996-01-321-3092
NSN 6610-00-099-4096
NSN 5915-01-309-6006