Retaining Ring Internal 0.8 mm Thk PK100 System of Measurement Metric Location Style Internal Thickness 0.8 mm Fits Shaft Diameter Not Applicable For Bore Diameter 8 mm Fits Groove Diameter 8.4 mm Fits Groove Width 0.9 mm Fits Groove Depth 0.2 mm Free Outside Diameter 8.7 mm Material Steel Finish Black Phosphate Material Grade/Class Ungraded Tensile Strength 120 000 psi Ring Type Housing Ring Material Quality Standards DIN 472 Manufacturer Location Made in USA