Retaining Ring Internal 2.5 mm Thk PK5 System of Measurement Metric Location Style Internal Thickness 2.5 mm Fits Shaft Diameter Not Applicable For Bore Diameter 77 mm Fits Groove Diameter 80 mm Fits Groove Width 2.65 mm Free Outside Diameter 81.5 mm Clearance Diameter 62 mm Material Steel Finish Plain Material Grade/Class Ungraded Ring Type Housing Ring Clearance Diameter Type Compressed Material Quality Standards DIN 472 Pack Size Small Pack