G8464 Drill Bushing Bushing Type Head Press Fit H Inside Dia 0.024 In Outside Dia 5/32 In Inside Dia Tolerance +.0001- +.0004 In Outside Dia Tolerance +0.0015 - +0.0012 In Concentricity Tolerance .0003 In T.I.R. Max Overall Length 1/4 In Material 52100 Thru Hardened Finish STEEL Drill Size # 73 Hardness RC 62-64