Metric Internal Push-On Ring System of Measurement Metric Location Style Internal Thickness 0.5 mm Fits Shaft Diameter Not Applicable For Bore Diameter 30 mm Fits Groove Diameter 30.2 mm Fits Groove Width 1 mm Fits Groove Depth Not Applicable Free Inside Diameter 21 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