Manufacturer Part Number: TT91054|Thread Size (Inch)|1/4-28Thread Size (mm)|Thread Standard|UNFChamfer|PlugMaterial|HSSCoating/Finish|Bright/UncoatedThread Direction|Right HandCoolant Through|NoClass Of Fit|2B/3BThread Limit|H3Number Of Flutes|2Oversize|NoInterrupted Thread|NoThreads per Inch|28Overall Length (Inch)|2-1/2Thread Pitch (Decimal Inch)|0.0357Thread Pitch (mm)|Material Grade|Thread Length (Decimal Inch)|1.0000Thread Length (Inch)|1Thread Length (mm)|Overall Length (Decimal Inch)|2.5Overall Length (mm)|Cnc Shank|YesAmount Oversize (Decimal Inch)|Shank Diameter (mm)|Shank Diameter (Decimal Inch)|0.2550Application|Through-Hole ThreadingNeck Length (mm)|Neck Length (Decimal Inch)|Neck Length (Inch)|Tapping Depth (Fractional Inch)|1Tapping Depth (mm)|Tapping Depth (Decimal Inch)|1.0000Square Length (mm)|Square Length (Inch)|5/16Square Length (Decimal Inch)|0.3125Square Size (Decimal Inch)|0.191Square Size (mm)|Material Application|General PurposeSeries|High Speed Steel - Spiral Point Plug TapsStyle|Spiral PointProduct Service Code|UNSPSC Code|23241600