Retaining Ring External 1 mm Thk PK100 System of Measurement Metric Location Style External Thickness 1 mm Fits Shaft Diameter 9 mm For Bore Diameter 8.4 mm Fits Groove Diameter 8.6 mm Fits Groove Width 1.1 mm Fits Groove Depth 0.2 mm Free Inside Diameter 8.4 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