Manufacturer Part Number: 12992-91C|Thread Size (Inch)|1/4-28Thread Size (mm)|Thread Standard|UNFChamfer|BottomingChamfered Threads|2.5PMaterial|Powdered Metal High-Speed SteelCoating/Finish|TiCNCoolant Through|NoClass Of Fit|2BThread Limit|H7Overall Length (Inch)|2-1/2Overall Length (Decimal Inch)|2.5000Overall Length (mm)|Thread Direction|Right HandThread Length (Inch)|Thread Length (Decimal Inch)|0.7900Thread Length (mm)|Shank Diameter (Inch)|Shank Diameter (Decimal Inch)|0.2550Shank Diameter (mm)|Square Length (Inch)|Square Length (Decimal Inch)|Square Length (mm)|Material Application|SteelApplication|Blind Hole ThreadingSeries|BXSTEELTapping Depth (Decimal Inch)|1.0000Tapping Depth (mm)|Square Size (Decimal Inch)|0.1910Square Size (mm)|Threads per Inch|Flute By Diameter Ratio|Material Grade|Oil Grooves|1Material Application Code|Trade Name|Number Of Flutes|Product Service Code|UNSPSC Code|23241600