Spiral Fluted Tap Overall Thread Thread+Neck Shank Size of Length of length length length dia. square square L ℓ ℓn Ds K ℓk ZELX ALS SP Spiral Fluted Taps for Aluminum Spiral Fluted Taps (for blind hole) Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (inch) flutes 5/16-18UNC GH3 Y86412 2.5P 3.543 0.866 1.378 0.318 0.238 0.375 3 2 5/16-24UNF GH3 Y86414 2.5P 3.543 0.866 1.378 0.318 0.238 0.375 3 2 GH3 Y86416 Spiral Fluted Taps (for through hole) 3/8-16UNC 2.5P 3.937 0.945 1.535 0.381 0.286 0.437 3 2 GH5 Y86417 3/8-24UNF GH3 Y86418 2.5P 3.543 0.787 1.535 0.381 0.286 0.437 3 2 7/16-14UNC GH3 Y86420 2.5P 3.937 0.945 - 0.323 0.242 0.406 3 3 7/16-20UNF GH3 Y86422 2.5P 3.937 0.945 - 0.323 0.242 0.406 3 3 Spiral Pointed Taps (for through hole) 1/2-13UNC GH3 Y86424 2.5P 4.331 1.142 - 0.367 0.275 0.437 3 3 1/2-20UNF GH3 Y86426 2.5P 3.937 0.866 - 0.367 0.275 0.437 3 3 Hand Taps Cemented Carbide Taps Roll Taps Pipe Taps Simple Inspection Tools Thread Mills Dies Center Drills Centering Tools ANSI SP-21 208