Metric External Push-On Ring System of Measurement Metric Location Style External Thickness 0.25 mm Fits Shaft Diameter 3 mm For Bore Diameter Not Applicable Fits Groove Diameter 2.9 mm Fits Groove Width 0.4 mm Fits Groove Depth Not Applicable Free Inside Diameter 2.8 mm Free Outside Diameter 8 mm Clearance Diameter Not Applicable Material Steel Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Self-Locking External Push-On Ring