Retaining Ring Internal 1.5 mm Thk System of Measurement Metric Location Style Internal Thickness 1.5 mm Fits Shaft Diameter Not Applicable For Bore Diameter 38 mm Fits Groove Diameter 40 mm Fits Groove Width 1.6 mm Fits Groove Depth 1 mm Free Outside Diameter 40.8 mm Material Steel Finish Black Phosphate Material Grade/Class Ungraded Tensile Strength 150 000 psi Ring Type Housing Ring Material Quality Standards DIN 472 Manufacturer Location Made in USA