Internal Medium Duty Spiral Ring System of Measurement Inch Location Style Internal Thickness 0.031 in Fits Shaft Diameter Not Applicable For Bore Diameter 7/8 in Fits Groove Diameter 0.912 in Fits Groove Width 0.036 in Fits Groove Depth 0.019 in Free Inside Diameter Not Applicable Free Outside Diameter 0.922 in Clearance Diameter Not Applicable Material Steel Finish Plain Material Grade/Class Not Graded Tensile Strength Not Applicable Ring Type Internal Medium Duty Spiral Ring