TYPE:9 TYPE:7 TYPE:5 TYPE:3 TYPE:1 L length TYPE:8 TYPE:6 TYPE:4 TYPE:2 Overall TYPE:10 ℓ length Thread length ℓn Thread + Neck ℓs Shank length dia. Ds Shank K square Size of ℓk square Length of Center Drills Thread Mills Special Thread Taps Cemented Spiral Pointed Taps Spiral Fluted Taps Spiral Fluted Taps Dies Pipe Taps Roll Taps Hand Taps JIS ④-4 Centering Tools Premium Thread Mills Simple Inspection Tools Carbide Taps (for through hole) (for through hole) (for blind hole) JIS ④ ⑪ ⑩ ⑨ ⑧ ⑦ ⑥ ⑤ ④ ③ ② ①