G2772 Drill Bushing Bushing Type Head Press Fit H Inside Dia 0.323 In Outside Dia 5/8 In Inside Dia Tolerance +.0001- +.0005 In Outside Dia Tolerance +0.0017 - +0.0014 In Concentricity Tolerance .0003 In T.I.R. Max Overall Length 1/2 In Material 52100 Thru Hardened Finish STEEL Drill Size P Hardness RC 62-64