Retaining Ring Internal 1.2 mm Thk PK50 System of Measurement Metric Location Style Internal Thickness 1.2 mm Fits Shaft Diameter Not Applicable For Bore Diameter 27 mm Fits Groove Diameter 28.4 mm Fits Groove Width 1.3 mm Free Outside Diameter 29.1 mm Clearance Diameter 18.2 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