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 6240-00-466-0703
NSN 5965-00-605-8239
NSN 5895-01-301-2132
NSN 5835-00-065-6757
NSN 6320-01-312-0964
NSN 5975-01-395-4105
NSN 5835-01-125-2558
NSN 6645-00-503-1379
NSN 6135-01-493-7624
NSN 6645-00-754-4108
NSN 6130-01-061-6785
NSN 5975-00-321-1146