Overall Thread Thread+Neck Shank Size of Length of length length length dia. square square L ℓ ℓn Ds K ℓk ZELX AL PO Spiral Pointed Taps for Aluminum Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type (for blind hole) Spiral Fluted Taps (inch) (inch) (inch) (inch) (inch) (inch) flutes GH3 Y86209 1/4-28UNF 5P 3.15 0.748 1.181 0.255 0.191 0.312 3 1 GH4 Y86211 GH3 Y86212 5/16-18UNC 5P 3.543 0.866 1.378 0.318 0.238 0.375 3 2 (for through hole) Spiral Fluted Taps GH5 Y86213 GH3 Y86214 5/16-24UNF 5P 3.543 0.866 1.378 0.318 0.238 0.375 3 2 GH4 Y86215 GH3 Y86216 3/8-16UNC 5P 3.937 0.945 1.535 0.381 0.286 0.437 3 2 GH5 Y86217 (for through hole) Spiral Pointed Taps GH3 Y86218 3/8-24UNF 5P 3.543 0.787 1.535 0.381 0.286 0.437 3 2 GH4 Y86219 GH3 Y86220 7/16-14UNC 5P 3.937 0.945 - 0.323 0.242 0.406 3 3 GH5 Y86221 GH3 Y86222 Hand Taps 7/16-20UNF 5P 3.937 0.945 - 0.323 0.242 0.406 3 3 GH5 Y86223 GH3 Y86224 1/2-13UNC 5P 4.331 1.142 - 0.367 0.275 0.437 3 3 GH5 Y86225 GH3 Y86226 Carbide Taps Cemented 1/2-20UNF 5P 3.937 0.866 - 0.367 0.275 0.437 3 3 GH5 Y86227 Roll Taps Simple Inspection Tools Pipe Taps Thread Mills Dies Center Drills Centering Tools ANSI PO-14 241