Steel, comp 4130, rockwell c scale 31.0 min 35.0 max hardness, dim., 2.1860in. Min 2.1867 in. Max od, 1.990 in. Min 2.002 in.Max body id, 0.815 in. Min0.820 in. Max o/a lg, sae 6 splines to be equally spaced within 0.002nonaccumulative within body id, 63 microinch aa finish od surface of body, 125microinch aa finish all other surfaces, dia's concentric within 0.005 in.Tir, magnetic particle inspected per mil-i-6868
