Spiral Fluted Tap SP Spiral Fluted Taps 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 No.6-32UNC GH4 SSUN6J4NEB 2.5P 2.205 0.433 0.768 1.358 0.141 0.11 0.187 3 2 GH1 SSUN6H1NEB No.6-40UNF 2.5P 2.205 0.433 0.768 1.358 0.141 0.11 0.187 3 2 GH2 SSUN6H2NEB Spiral Fluted Taps (for through hole) GH2 SSUN8J2NEB No.8-32UNC 2.5P 2.48 0.512 0.827 1.535 0.168 0.131 0.25 3 2 GH3 SSUN8J3NEB GH2 SSUN8I2NEB No.8-36UNF 2.5P 2.48 0.512 0.827 1.535 0.168 0.131 0.25 3 2 GH3 SSUN8I3NEB Spiral Pointed Taps (for through hole) GH2 SSUNAM2NEB No.10-24UNC 2.5P 2.756 0.551 0.984 1.654 0.194 0.152 0.25 3 2 GH3 SSUNAM3NEB GH2 SSUNAJ2NEB No.10-32UNF 2.5P 2.756 0.551 0.984 1.654 0.194 0.152 0.25 3 2 GH3 SSUNAJ3NEB GH2 SSUNCM2NEB Hand Taps No.12-24UNC 2.5P 3.15 0.591 0.984 1.929 0.220 0.165 0.281 3 2 GH3 SSUNCM3NEB GH2 SSUNCK2NEB No.12-28UNF 2.5P 3.15 0.591 0.984 1.929 0.220 0.165 0.281 3 2 GH3 SSUNCK3NEB GH2 SSU04N2NEB Cemented Carbide Taps GH3 SSU04N3NEB 1/4-20UNC 2.5P 3.15 0.591 1.181 1.713 0.255 0.191 0.312 3 2 GH5 SSU04N5NEB GH11 SSU04N-EEB GH2 SSU04K2NEB Roll Taps GH3 SSU04K3NEB 1/4-28UNF 2.5P 3.15 0.591 1.181 1.713 0.255 0.191 0.312 3 2 GH4 SSU04K4NEB GH11 SSU04K-EEB GH2 SSU05O2NEB GH3 SSU05O3NEB Pipe Taps Simple Inspection Tools 5/16-18UNC 2.5P 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 3 GH5 SSU05O5NEB GH11 SSU05O-EEB GH2 SSU05M2NEB GH3 SSU05M3NEB 5/16-24UNF GH4 SSU05M4NEB 2.5P 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 3 GH5 SSU05M5NEB GH11 SSU05M-EEB GH3 SSU06P3NEB Thread Mills GH4 SSU06P4NEB 3/8-16UNC 2.5P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 3 GH5 SSU06P5NEB GH11 SSU06P-EEB GH2 SSU06M2NEB Dies GH3 SSU06M3NEB 3/8-24UNF 2.5P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 3 GH4 SSU06M4NEB GH11 SSU06M-EEB GH3 SSU07Q3NEB 7/16-14UNC GH4 SSU07Q4NEB 2.5P 3.937 0.906 - 2.008 0.323 0.242 0.406 3 4 Center Drills GH5 SSU07Q5NEB GH2 SSU07N2NEB 7/16-20UNF GH3 SSU07N3NEB 2.5P 3.937 0.906 - 2.008 0.323 0.242 0.406 3 4 GH5 SSU07N5NEB Centering Tools GH3 SSU08R3NEB GH4 SSU08R4NEB 1/2-13UNC 2.5P 4.331 1.024 - 2.205 0.367 0.275 0.437 3 4 GH5 SSU08R5NEB GH11 SSU08R-EEB ANSI SP-3 190