Product Details: Manufacturer Part Number: C57139|Thread Size (Inch)|1/4-28Thread Size (mm)|Thread Standard|UNFChamfer|PlugMaterial|High Speed SteelCoating/Finish|BrightThread Direction|Right HandCoolant Through|NoClass Of Fit|3BThread Limit|H3Number Of Flutes|2Oversize|No; YesInterrupted Thread|Threads per Inch|28Overall Length (Inch)|2-1/2Thread Pitch (Decimal Inch)|Thread Pitch (mm)|Material Grade|Thread Length (Decimal Inch)|0.6300Thread Length (Inch)|5/8Thread Length (mm)|25.40Overall Length (Decimal Inch)|2.5000Overall Length (mm)|63.50Cnc Shank|Amount Oversize (Decimal Inch)|Shank Diameter (mm)|6.48Shank Diameter (Decimal Inch)|0.2550Application|Through-Hole ThreadingNeck Length (mm)|Neck Length (Decimal Inch)|0.3900Neck Length (Inch)|25/64Tapping Depth (Fractional Inch)|Tapping Depth (mm)|Tapping Depth (Decimal Inch)|Square Length (mm)|7.94Square Length (Inch)|5/16Square Length (Decimal Inch)|0.3125Square Size (Decimal Inch)|0.1910Square Size (mm)|4.85Material Application|Alloy Steel; Aluminum; Carbon SteelSeries|1011Style|Product Service Code|UNSPSC Code|