Retaining Ring, System of Measurement Metric, Location Style External, Thickness 2 mm, Fits Shaft Diameter 29 mm, For Bore Diameter Not Applicable, Fits Groove Diameter 28.6 mm, Fits Groove Width 2.15 mm, Fits Groove Depth 0.75 mm, Free Inside Diameter 26.9 mm, Free Outside Diameter Not Applicable, Clearance Diameter Not Applicable, Material Spring Steel, Finish Black Phosphate, Material Grade/Class 1060-1090, Tensile Strength Not Applicable, Ring Type External Retaining Ring