⑦ Special Thread Taps / Simple Inspection Tools Overall length L Thread length ℓ Thread + Neck ℓn length Shank length ℓs Shank dia. Ds Size of square K Length of square ℓk ANSI SP STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts L ℓ ℓn ℓs Ds K ℓk No. of TYPE Size Class Code Chamfer Spiral Fluted Taps (for blind hole) (inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes ① 1/4-28UNF GH3 SUU04K3NEB 2P 3.543 0.748 1.378 1.831 0.318 0.238 0.375 3 2 5/16-18UNC GH2 SUU05O2NEB 2P 3.937 0.906 1.535 2.067 0.381 0.286 0.437 3 2 5/16-18UNC GH3 SUU05O3NEB 2P 3.937 0.906 1.535 2.067 0.381 0.286 0.437 3 2 5/16-24UNF GH2 SUU05M2NEB 2P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 2 Spiral Fluted Taps (for through hole) 5/16-24UNF GH3 SUU05M3NEB 2P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 2 ② 3/8-16UNC GH2 SUU06P2NEB 2P 4.331 1.024 - 2.205 0.367 0.275 0.437 3 3 3/8-16UNC GH3 SUU06P3NEB 2P 4.331 1.024 - 2.205 0.367 0.275 0.437 3 3 3/8-24UNF GH2 SUU06M2NEB 2P 3.937 0.906 - 2.008 0.323 0.242 0.406 3 3 3/8-24UNF GH3 SUU06M3NEB 2P 3.937 0.906 - 2.008 0.323 0.242 0.406 3 3 Spiral Pointed Taps (for through hole) ③ 7/16-14UNC GH2 SUU07Q2NEB 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 7/16-14UNC GH3 SUU07Q3NEB 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 7/16-20UNF GH2 SUU07N2NEB 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 7/16-20UNF GH3 SUU07N3NEB 2P 4.331 1.024 - 2.205 0.429 0.322 0.5 3 3 1/2-13UNC Hand Taps GH2 SUU08R2NEB 2P 4.331 1.024 - 2.205 0.48 0.36 0.562 3 3 ④ 1/2-13UNC GH3 SUU08R3NEB 2P 4.331 1.024 - 2.205 0.48 0.36 0.562 3 3 1/2-20UNF GH2 SUU08N2NEB 2P 4.331 1.024 - 2.205 0.48 0.36 0.562 3 3 1/2-20UNF GH3 SUU08N3NEB 2P 4.331 1.024 - 2.205 0.48 0.36 0.562 3 3 Cemented Carbide Taps ⑤ Roll Taps ⑥ Special Thread Taps Simple Inspection Tools ⑦ Pipe Taps ⑧ Thread Mills Premium Thread Mills ⑨ Dies ⑩ Center Drills Centering Tools ⑪ ANSI ⑦-13 ※ This product is different from JIS products in shape and dimensions, please be careful when using.