Spiral Fluted 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 SP STI Spiral Fluted 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) (inch) (inch) flutes GH2 SUU06M2NEB STI 3/8-24UNF 2P 3.937 0.906 - 2.008 0.323 0.242 0.406 3 3 GH3 SUU06M3NEB GH2 SUU07Q2NEB Spiral Fluted Taps (for through hole) STI 7/16-14UNC 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 GH3 SUU07Q3NEB GH2 SUU07N2NEB STI 7/16-20UNF 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 GH3 SUU07N3NEB GH2 SUU08R2NEB STI 1/2-13UNC 2P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 3 Spiral Pointed Taps (for through hole) GH3 SUU08R3NEB GH2 SUU08N2NEB STI 1/2-20UNF 2P 4.331 1.024 - 2.205 0.480 0.36 0.562 3 3 GH3 SUU08N3NEB Hand Taps Cemented Carbide Taps Roll Taps Pipe Taps Simple Inspection Tools Thread Mills Dies Center Drills Centering Tools ANSI SP-23 210