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 5855-01-344-8688
NSN 4140-01-485-5351
NSN 6110-01-502-9212
NSN 5935-01-151-3004
NSN 6150-00-008-8633
NSN 5895-01-359-9723
NSN 6240-01-377-5503
NSN 5975-00-419-7819
NSN 5905-00-074-4481
NSN 5996-01-500-2820
NSN 5905-01-062-4440
NSN 5985-01-517-2509