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 6240-01-363-2168
NSN 5930-01-534-6216
NSN 7035-01-463-9855
NSN 6650-01-310-7403
NSN 5895-00-248-2392
NSN 6610-01-442-3509
NSN 6620-01-222-0143
NSN 5930-01-125-8720
NSN 5905-01-605-1569
NSN 6130-01-156-4151
NSN 5965-00-144-2543
NSN 6150-00-419-4115