Internal Retaining Ring Spiral Carbon Steel Oil For Bore Dia 3 1/4 In Free OD 3.470 In Thickness 0.111 In Thickness Tolerance +/-0.003 In Fits Groove Dia 3.446 In Groove Dia Tolerance +/-0.006 In Fits Groove Width 0.120 In Groove Width Tolerance 0.005 In Fits Groove Depth 0.098 In Meets ANSI Tensile Strength 211 000 PSI