Bowed External Ring System of Measurement Inch Location Style External Thickness 0.025 in Fits Shaft Diameter 1/4 in For Bore Diameter Not Applicable Fits Groove Diameter 0.23 in Fits Groove Width 0.04 in Fits Groove Depth 0.01 in Free Inside Diameter 0.225 in Free Outside Diameter Not Applicable Clearance Diameter 0.43 in Material Steel Finish Black Phosphate Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Bowed External Ring