External Medium Duty Spiral Ring System of Measurement Inch Location Style External Thickness 0.025 in Fits Shaft Diameter 1/2 in For Bore Diameter Not Applicable Fits Groove Diameter 0.474 in Fits Groove Width 0.03 in Fits Groove Depth 0.013 in Free Inside Diameter 0.467 in Free Outside Diameter Not Applicable Clearance Diameter Not Applicable Material Steel Finish Plain Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type External Medium Duty Spiral Ring