Heavy Duty External Ring System of Measurement Inch Location Style External Thickness 0.093 in Fits Shaft Diameter 1 3/8 in For Bore Diameter Not Applicable Fits Groove Diameter 1.291 in Fits Groove Width 0.103 in Fits Groove Depth 0.042 in Free Inside Diameter 1.268 in Clearance Diameter 1.75 in Material Steel Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type External Heavy Duty Ring Thickness Tolerance +/-0.003 in