Internal Heavy Duty Spiral Ring System of Measurement Inch Location Style Internal Thickness 0.015 in Fits Shaft Diameter Not Applicable For Bore Diameter 1/4 in Fits Groove Diameter 0.268 in Fits Groove Width 0.02 in Fits Groove Depth 0.009 in Free Inside Diameter Not Applicable Free Outside Diameter 0.27 in Clearance Diameter Not Applicable Material Steel Finish Plain Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Heavy Duty Spiral Ring