Manufacturer Part Number: 2940308|Thread Size (Inch)|1/4-20Thread Size (mm)|Thread Standard|UNCChamfer|Modified BottomingMaterial|Vanadium High-Speed SteelCoating/Finish|TiCNThread Direction|Right HandCoolant Through|NoClass Of Fit|Thread Limit|H11Number Of Flutes|3Flute Direction|Right HandHelix Angle|45Threads per Inch|20Thread Depth (mm)|Overall Length (Inch)|2-1/2Thread Length (Decimal Inch)|0.397Thread Length (mm)|Thread Length (Inch)|Overall Length (Decimal Inch)|Overall Length (mm)|18Thread Depth (Decimal Inch)|Thread Pitch (Decimal Inch)|Thread Pitch (mm)|Thread Pitch (Inch)|Material Grade|Amount Oversize (Decimal Inch)|Oversize|YesApplication|Shank Diameter (Decimal Inch)|0.2550Shank Diameter (mm)|28.1432Neck Length (mm)|93Neck Length (Inch)|Neck Length (Decimal Inch)|Tapping Depth (Decimal Inch)|Tapping Depth (mm)|Tapping Depth (Fractional Inch)|Square Length (mm)|26.9875Square Length (Inch)|Square Length (Decimal Inch)|0.3125Square Size (Decimal Inch)|0.191Square Size (mm)|21.174Flute Style|SpiralMaterial Application|Alloy Steel; Carbon Steel; Cast Iron; Stainless Steel; Die Steel; Hardened SteelSeries|290Helix Angle Range|Shank Length (mm)|Shank Length (Decimal Inch)|UNSPSC Code|Product Service Code|