Retaining Ring Internal 0.05 in Thk PK25 System of Measurement Not Applicable Location Style Internal Thickness 0.05 in Fits Shaft Diameter Not Applicable For Bore Diameter 1 1/2 in Fits Groove Diameter 1.594 in Fits Groove Width 0.056 in Fits Groove Depth Not Applicable Free Inside Diameter Not Applicable Free Outside Diameter 1.66 in Clearance Diameter 1.5 in Material Steel Finish Plain Material Grade/Class Ungraded Tensile Strength Not Applicable Ring Type Retaining Ring