Overall Chamfer + Thread Thread+Neck Shank Shank Size of Length of length full thread length length length dia. square square L ℓt ℓ ℓn ℓs Ds K ℓk SP OX (for blind hole) Spiral Fluted Taps Spiral Fluted Taps, Oxided Specification (for through hole) Spiral Fluted Taps E Oxide ~ M2.6 M26 ~ Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Free cutting and Carbon steel and structural steel low alloy steel IS P IS P 5〜10 5〜10 (m/min) (m/min) For icon explanation, refer to P.50 Hand Taps TYPE:1 DIN371 TYPE:2 DIN371 Carbide Taps Cemented TYPE:3 DIN352 TYPE:4 DIN376 / DIN374 Roll Taps TYPE:5 DIN352 TYPE:6 DIN371 Simple Inspection Tools Special Thread Taps Pipe Taps TYPE:7 DIN352 TYPE:8 DIN376 / DIN374 / DIN5156 Thread Mills Dies Center Drills Centering Tools DIN SP-8 59