Metric Basic Internal DIN472 System of Measurement Metric Location Style Internal Thickness 1 mm Fits Shaft Diameter Not Applicable For Bore Diameter 19 mm Fits Groove Diameter 20 mm Fits Groove Width 1.1 mm Fits Groove Depth 0.5 mm Free Inside Diameter Not Applicable Free Outside Diameter 20.5 mm Clearance Diameter Not Applicable Material Stainless Steel Finish Plain Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Ring