Material is steel, federal standard no. 66; steel no.S 1008 to 1022
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 5945-01-088-9048
NSN 5930-01-062-0804
NSN 5985-01-452-0383
NSN 5960-00-521-0221
NSN 5950-01-650-6804
NSN 6135-00-593-6831
NSN 6220-00-453-6973
NSN 6685-00-526-7916
NSN 6650-01-165-2175
NSN 6650-01-372-6013
NSN 6685-01-438-4057
NSN 5895-01-170-8032