Heavy Duty External Ring System of Measurement Inch Location Style External Thickness 0.078 in Fits Shaft Diameter 1 in For Bore Diameter Not Applicable Fits Groove Diameter 0.938 in Fits Groove Width 0.086 in Fits Groove Depth 0.031 in Free Inside Diameter 0.906 in Clearance Diameter 1.31 in Material Steel Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type External Heavy Duty Ring Thickness Tolerance +/-0.003 in Groove Width Tolerance +/-0.005/0.000 In.