Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ⑦ Special Thread Taps / Simple Inspection Tools Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk ANSI SP STI Spiral Fluted Taps for Helical Coil Wire Screw Thread Inserts ① Size Class Code Chamfer L (inch) ℓ(inch) ℓn(inch) ℓs(inch) Ds(inch) K(inch) ℓk(inch) No. offlutesTYPE1/4-28UNFGH3SUU04K3NEB2P3.5430.7481.3781.8310.3180.2380.37532 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 ② 5/16-24UNF GH3 SUU05M3NEB 2P 3.937 0.906 1.535 2.028 0.381 0.286 0.437 3 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 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 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 ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ANSI ⑦-13 ※ This product is different from JIS products in shape and dimensions, please be careful when using.