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 STI Hand Taps for Helical Coil Wire Screw Thread Inserts 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 TUU04N2NEB5 5P GH2 TUU04N2NEBA 1.5P STI 1/4-20UNC 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2 TUU04N3NEB5 5P Spiral Fluted Taps (for through hole) GH3 TUU04N3NEBA 1.5P TUU04K2NEB5 5P GH2 TUU04K2NEBA 1.5P STI 1/4-28UNF 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2 TUU04K3NEB5 5P GH3 Spiral Pointed Taps (for through hole) TUU04K3NEBA 1.5P TUU05O2NEB5 5P GH2 TUU05O2NEBA 1.5P STI 5/16-18UNC 3.937 0.906 1.535 2.067 0.381 0.286 0.437 4 2 TUU05O3NEB5 5P GH3 TUU05O3NEBA 1.5P Hand Taps TUU05M2NEB5 5P GH2 TUU05M2NEBA 1.5P STI 5/16-24UNF 3.937 0.906 1.535 2.028 0.381 0.286 0.437 4 2 TUU05M3NEB5 5P GH3 TUU05M3NEBA 1.5P Cemented Carbide Taps TUU06P3NEB5 5P GH3 TUU06P3NEBA 1.5P STI 3/8-16UNC 4.331 1.024 - 2.205 0.367 0.275 0.437 4 3 TUU06P4NEB5 5P GH4 TUU06P4NEBA 1.5P Roll Taps TUU06M2NEB5 5P GH2 TUU06M2NEBA 1.5P STI 3/8-24UNF 3.937 0.906 - 2.008 0.323 0.242 0.406 4 3 TUU06M3NEB5 5P GH3 TUU06M3NEBA 1.5P TUU07Q3NEB5 5P Pipe Taps Simple Inspection Tools GH3 TUU07Q3NEBA 1.5P STI 7/16-14UNC 4.331 1.024 - 2.205 0.429 0.322 0.5 4 3 TUU07Q4NEB5 5P GH4 TUU07Q4NEBA 1.5P TUU07N3NEB5 5P GH3 TUU07N3NEBA 1.5P STI 7/16-20UNF 4.331 1.024 - 2.205 0.429 0.322 0.5 4 3 TUU07N4NEB5 5P GH4 TUU07N4NEBA 1.5P TUU08R3NEB5 5P GH3 Thread Mills TUU08R3NEBA 1.5P STI 1/2-13UNC 4.331 1.024 - 2.205 0.48 0.36 0.562 4 3 TUU08R4NEB5 5P GH4 TUU08R4NEBA 1.5P TUU08N3NEB5 5P GH3 Dies TUU08N3NEBA 1.5P STI 1/2-20UNF 4.331 1.024 - 2.205 0.48 0.36 0.562 4 3 TUU08N4NEB5 5P GH4 TUU08N4NEBA 1.5P Center Drills Centering Tools ANSI HT-17 268