Hand Tap Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk Spiral Fluted Taps (for blind hole) EH-HT Hand Taps for Hard-to-Machine Materials Spiral Fluted Taps (for through hole) Specification ■Suitable for hard steels of 35 ~ 45HRC, such as forgings and thermal refined steels of high carbon steels and alloy steels, and die steels. Spiral Pointed Taps (for through hole) Recommended Tapping Speed depending on Materials Thermal re ned steels Tool steels 〜5 〜5 TYPE:1 35~45HRC Hand Taps For icon explanation, refer to P.50 Cemented Carbide Taps TYPE:2 TYPE:3 Roll Taps Segment:1B Pipe Taps Simple Inspection Tools Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type (inch) (inch) (inch) (inch) (inch) (inch) (inch) flutes For Metric threads M5 × 0.8 D5 TS5.0K5DCB5 5P 3.15 0.591 0.984 1.929 0.22 0.165 0.281 3 1 M6 × 1 D6 TS6.0M6DCB5 5P 3.15 0.591 1.181 1.713 0.255 0.191 0.312 3 1 M8 × 1.25 D6 TS8.0N6DCB5 5P 3.543 0.748 1.382 1.831 0.318 0.238 0.375 4 2 M8 × 1 D6 TS8.0M6DCB5 5P 3.543 0.748 1.382 1.831 0.318 0.238 0.375 4 2 M10 × 1.5 D7 TS010O7DCB5 5P 3.937 0.906 - 2.008 0.323 0.242 0.406 4 3 M10 × 1.25 D6 TS010N6DCB5 5P 3.937 0.906 - 2.008 0.323 0.242 0.406 4 3 M12 × 1.75 D7 TS012P7DCB5 5P 4.331 1.024 - 2.205 0.367 0.275 0.437 4 3 Thread Mills Dies Center Drills Centering Tools ANSI HT-21 272