Retaining Ring External 1 mm Thk PK100 System of Measurement Metric Location Style External Thickness 1 mm Fits Shaft Diameter 12 mm For Bore Diameter Not Applicable Fits Groove Diameter 11.5 mm Fits Groove Width 1.1 mm Free Inside Diameter 11 mm Clearance Diameter 19 mm Material Steel Finish Plain Material Grade/Class Ungraded Ring Type External Retaining Ring Clearance Diameter Type Expanded Material Quality Standards DIN 471 Pack Size Small Pack