G4639 Drill Bushing Bushing Type Headless Press Fit P Inside Dia 5.2mm Outside Dia 13/32 In Inside Dia Tolerance .0001-+.0004 In Outside Dia Tolerance +0.0012 - +0.0015 In Concentricity Tolerance .0003 In T.I.R. Max Overall Length 1/2 In Material 52100 Thru Hardened Finish Steel Drill Size 5.2mm Hardness RC 62-64