Manufacturer Part Number: 230-4373|Collet Type|StepCollet Size (Inch)|Collet Size (mm)|Material|SteelHead Diameter (Decimal Inch)|Head Diameter (Inch)|3Head Length (Inch)|Pilot Hole Size (Inch)|5/16Pilot Hole Size (Decimal Inch)|0.3125Concentricity of Collet (Decimal Inch)|Head Thickness (Inch)|1-1/8Overall Length (Decimal Inch)|Overall Length (Inch)|TIR (Decimal Inch)|TIR (mm)|Internal Thread Size|1.041 in-24External Thread Size|1.242 in-20Minimum Grip (Decimal Inch)|Minimum Grip (Inch)|Maximum Grip (Inch)|Maximum Grip (Decimal Inch)|Product Service Code|5136UNSPSC Code|