Retaining Ring, System of Measurement Metric, Location Style External, Thickness 0.5 mm, Fits Shaft Diameter 22 mm, For Bore Diameter Not Applicable, Fits Groove Diameter 21.75 mm, Fits Groove Width 1 mm, Fits Groove Depth Not Applicable, Free Inside Diameter 21.5 mm, Free Outside Diameter 31 mm, Clearance Diameter Not Applicable, Material Spring Steel, Finish Black Phosphate, Material Grade/Class 1060-1090, Tensile Strength Not Applicable, Ring Type Self-Locking Retaining Ring