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(Coating) (for blind hole) Spiral Fluted Taps Spiral Fluted Taps, Coated Specification (for through hole) Spiral Fluted Taps E Coating ~ M2.6 Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Free cutting and Carbon steel and Medium alloy steel and High alloy steel structural steel low alloy steel heat treated steel IS P IS P IS P IS P 10〜20 10〜20 10〜20 10〜20 (m/min) (m/min) (m/min) (m/min) For icon explanation, refer to P.50 Hand Taps TYPE:1 DIN371 TYPE:2 DIN371 Carbide Taps Cemented Roll Taps TYPE:3 DIN371 TYPE:4 DIN376 / DIN374 Simple Inspection Tools Special Thread Taps TYPE:5 DIN376 TYPE:6 DIN5156 Pipe Taps Thread Mills Dies Center Drills Centering Tools DIN SP-6 57