Email PrintMaterial : 1020 Steel or Equivalent Heat Treat : Carburized, Hardened and Ground Finish : Black Oxide Inch Part No.ABCDEFG + .0005 - .0000 01-02-0023½12¾25/85/16 or M83/4 01-02-0044½13¾35/85/16 or M83/4 01-02-0065½14¾45/85/16 or M83/4