Metric External Push-On Ring System of Measurement Metric Location Style External Thickness 0.3 mm Fits Shaft Diameter 12 mm For Bore Diameter Not Applicable Fits Groove Diameter 11.85 mm Fits Groove Width 0.6 mm Fits Groove Depth Not Applicable Free Inside Diameter 11.7 mm Free Outside Diameter 18 mm Clearance Diameter Not Applicable Material Steel Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Self-Locking External Push-On Ring