'Internal Retaining Ring, Carbon Steel, Zinc Yellow, For Bore Dia 1/2 In, Free OD 0.548 In, Thickness 0.035 In, Thickness Tolerance +/-0.002 In, Fits Groove Dia 0.530 In, Groove Dia Tolerance +/-0.002 In, Fits Groove Width 0.039 In, Groove Width Tolerance +0.003 In, Fits Groove Depth 0.015 In, Clearance Dia Compressed 0.260 In, Clearance Dia Released 0.290 In, Hole Dia 0.047 In, Meets ASME, Rockwell Hardness RC51-55, Tensile Strength 120, 000 PSI, Package 50'