Retaining Ring External 0.025 in Thk PK100 System of Measurement Inch Location Style External Thickness 0.025 in Fits Shaft Diameter 7/16 in For Bore Diameter Not Applicable Fits Groove Diameter 0.412 in Fits Groove Width 0.029 in Fits Groove Depth 0.013 in Free Inside Diameter 0.168 in Clearance Diameter 0.66 in Material Steel Finish Zinc Plated Material Grade/Class Ungraded Tensile Strength 120 000 psi Ring Type External Retaining Ring Clearance Diameter Type Expanded