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 5935-01-475-7182
NSN 6620-00-135-9338
NSN 5960-00-721-1744
NSN 4140-01-486-1436
NSN 5835-00-958-6231
NSN 6130-01-290-9776
NSN 5996-01-497-0749
NSN 5935-01-467-1710
NSN 4140-00-739-2033
NSN 6110-01-386-1536
NSN 5950-00-838-2908
NSN 5996-01-295-2004