Retaining Ring Internal 0.042 in Thk PK50 System of Measurement Inch Location Style Internal Thickness 0.042 in Fits Shaft Diameter Not Applicable For Bore Diameter 7/8 in Fits Groove Diameter 0.931 in Fits Groove Width 0.046 in Fits Groove Depth 0.028 in Free Outside Diameter 0.971 in Clearance Diameter 0.6 in Material Steel Finish Zinc Plated Material Grade/Class Ungraded Tensile Strength 150 000 psi Ring Type Housing Ring Clearance Diameter Type Expanded