Retaining Ring,External,2 mm Thk,PK5, System of Measurement Metric, Location Style External, Thickness 2 mm, Fits Shaft Diameter 60 mm, For Bore Diameter Not Applicable, Fits Groove Diameter 57 mm, Fits Groove Width 2.15 mm, Fits Groove Depth 1.5 mm, Free Inside Diameter 55.8 mm, Material Steel, Finish Black Phosphate, Material Grade/Class Ungraded, Tensile Strength 150,000 psi, Ring Type External Retaining Ring, Material Quality Standards DIN 471, Manufacturer Location Made in USA*