Metric Internal Push-On Ring System of Measurement Metric Location Style Internal Thickness 0.4 mm Fits Shaft Diameter Not Applicable For Bore Diameter 18 mm Fits Groove Diameter 18.15 mm Fits Groove Width 0.8 mm Fits Groove Depth Not Applicable Free Inside Diameter 10.5 mm Free Outside Diameter Not Applicable Clearance Diameter Not Applicable Material Spring Steel Material Grade/Class 1060-1090 Tensile Strength Not Applicable Ring Type Internal Push-On Ring