Hand Tap Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk HT OX STI Hand Taps for Helical Coil Wire Screw Thread Inserts, Oxided Spiral Fluted Taps (for blind hole) Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (mm) (mm) flutes TUU04N2NEX5 5P GH2 TUU04N2NEXA 1.5P STI 1/4-20UNC 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2 TUU04N3NEX5 5P Spiral Fluted Taps (for through hole) GH3 TUU04N3NEXA 1.5P TUU04K2NEX5 5P GH2 TUU04K2NEXA 1.5P STI 1/4-28UNF 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2 TUU04K3NEX5 5P GH3 Spiral Pointed Taps (for through hole) TUU04K3NEXA 1.5P TUU05O2NEX5 5P GH2 TUU05O2NEXA 1.5P STI 5/16-18UNC 3.937 0.906 1.535 2.067 0.381 0.286 0.437 4 2 TUU05O3NEX5 5P GH3 TUU05O3NEXA 1.5P Hand Taps TUU05M2NEX5 5P GH2 TUU05M2NEXA 1.5P STI 5/16-24UNF 3.937 0.906 1.535 2.028 0.381 0.286 0.437 4 2 TUU05M3NEX5 5P GH3 TUU05M3NEXA 1.5P Cemented Carbide Taps TUU06P3NEX5 5P GH3 TUU06P3NEXA 1.5P STI 3/8-16UNC 4.331 1.024 - 2.205 0.367 0.275 0.437 4 3 TUU06P4NEX5 5P GH4 TUU06P4NEXA 1.5P Roll Taps TUU06M2NEX5 5P GH2 TUU06M2NEXA 1.5P STI 3/8-24UNF 3.937 0.906 - 2.008 0.323 0.242 0.406 4 3 TUU06M3NEX5 5P GH3 TUU06M3NEXA 1.5P TUU07Q3NEX5 5P Pipe Taps Simple Inspection Tools GH3 TUU07Q3NEXA 1.5P STI 7/16-14UNC 4.331 1.024 - 2.205 0.429 0.322 0.5 4 3 TUU07Q4NEX5 5P GH4 TUU07Q4NEXA 1.5P TUU07N3NEX5 5P GH3 TUU07N3NEXA 1.5P STI 7/16-20UNF 4.331 1.024 - 2.205 0.429 0.322 0.5 4 3 TUU07N4NEX5 5P GH4 TUU07N4NEXA 1.5P TUU08R3NEX5 5P GH3 Thread Mills TUU08R3NEXA 1.5P STI 1/2-13UNC 4.331 1.024 - 2.205 0.48 0.36 0.562 4 3 TUU08R4NEX5 5P GH4 TUU08R4NEXA 1.5P TUU08N3NEX5 5P GH3 Dies TUU08N3NEXA 1.5P STI 1/2-20UNF 4.331 1.024 - 2.205 0.48 0.36 0.562 4 3 TUU08N4NEX5 5P GH4 TUU08N4NEXA 1.5P Center Drills Centering Tools ANSI HT-19 270