Retaining Ring Internal 0.025 in Thk PK50 System of Measurement Inch Location Style Internal Thickness 0.025 in Fits Shaft Diameter Not Applicable For Bore Diameter 3/8 in Fits Groove Diameter 0.397 in Fits Groove Width 0.029 in Fits Groove Depth 0.011 in Free Outside Diameter 0.415 in Clearance Diameter 0.226 in Material Steel Finish Zinc Plated Material Grade/Class Ungraded Tensile Strength 120 000 psi Ring Type Housing Ring Clearance Diameter Type Expanded