Retaining Ring External 1.5 mm Thk PK25 System of Measurement Metric Location Style External Thickness 1.5 mm Fits Shaft Diameter 30 mm For Bore Diameter Not Applicable Fits Groove Diameter 28.6 mm Fits Groove Width 1.6 mm Fits Groove Depth 0.7 mm Free Inside Diameter 27.9 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