Internal Retaining Ring Spiral Carbon Steel Oil For Bore Dia 2 7/8 In Free OD 3.072 In Thickness 0.093 In Thickness Tolerance +/-0.003 In Fits Groove Dia 3.051 In Groove Dia Tolerance +/-0.006 In Fits Groove Width 0.103 In Groove Width Tolerance 0.005 In Fits Groove Depth 0.088 In Meets ANSI Tensile Strength 211 000 PSI Package 5