Poodle Retaining Ring 0.035 in Thk PK100 System of Measurement Inch Location Style External Thickness 0.035 in Fits Shaft Diameter 1/4 in For Bore Diameter Not Applicable Fits Groove Diameter 0.21 in Fits Groove Width 0.039 in Fits Groove Depth 0.02 in Free Inside Diameter 0.188 in Free Outside Diameter 0.482 in Clearance Diameter 0.52 in Material Steel Finish Black Phosphate Material Grade/Class Ungraded Tensile Strength 150 000 psi Ring Type Poodle-Style Retaining Ring