Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk EH-HT (for blind hole) Spiral Fluted Taps Straight Fluted Taps for Hard-to-Machine Materials Specification (for through hole) Spiral Fluted Taps ■EH-HT is the hand tap suitable for hard steels of 35- 45HRC, such as forgings and thermal refined steels of high carbon steels and alloy steels, and die steels. Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Tool steel High tensile strength steel IS P IS P 〜5 〜5 (m/min) (m/min) 35~45HRC For icon explanation, refer to P.50 Fluted Taps Straight TYPE:1 DIN371 TYPE:2 DIN371 Carbide Taps Cemented TYPE:3 DIN374 / DIN5156 TYPE:4 DIN376 Roll Taps Segment:1B Simple Inspection Tools Special Thread Taps Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock Pipe Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M3 × 0.5 ISO2X TD3.0GBDCBC 2.5P 56 9 18 34 3.5 2.7 6 3 1 ● M4 × 0.7 ISO2X TD4.0IBDCBC 2.5P 63 13 21 38 4.5 3.4 6 3 1 ● M5 × 0.8 ISO2X TD5.0KBDCBC 2.5P 70 14 25 39 6 4.9 8 3 1 ● Thread Mills M6 × 1 ISO2X TD6.0MBDCBC 2.5P 80 15 30 45 6 4.9 8 3 1 ● M8 × 1.25 ISO2X TD8.0NBDCBC 2.5P 90 19 35 47 8 6.2 9 4 2 ● M8 × 1 ISO2X TM8.0MBDCBC 2.5P 90 19 - 46 6 4.9 8 4 3 ● M10 × 1.5 ISO2X TD010OBDCBC 2.5P 100 23 39 52 10 8 11 4 2 ● M10 × 1.25 ISO2X TM010NBDCBC 2.5P 100 23 - 51 7 5.5 8 4 3 ● Dies M10 × 1 ISO2X TM010MBDCBC 2.5P 90 19 - 46 7 5.5 8 4 3 ● M12 × 1.75 ISO2X TG012PBDCBC 2.5P 110 26 - 56 9 7 10 4 4 ● M12 × 1.5 ISO2X TM012OBDCBC 2.5P 100 21 - 51 9 7 10 4 3 ● M12 × 1.25 ISO2X TM012NBDCBC 2.5P 100 21 - 51 9 7 10 4 3 ● Center Drills M14 × 2 ISO2X TG014QBDCBC 2.5P 110 26 - 56 11 9 12 4 4 ● M14 × 1.5 ISO2X TM014OBDCBC 2.5P 100 21 - 51 11 9 12 4 3 ● M16 × 2 ISO2X TG016QBDCBC 2.5P 110 26 - 56 12 9 12 4 4 ● M16 × 1.5 ISO2X TM016OBDCBC 2.5P 100 21 - 51 12 9 12 4 3 ● Centering Tools M18 × 2.5 ISO2X TG018RBDCBC 2.5P 125 33 - 64 14 11 14 4 4 M18 × 1.5 ISO2X TM018OBDCBC 2.5P 110 24 - 56 14 11 14 4 3 M20 × 2.5 ISO2X TG020RBDCBC 2.5P 140 33 - 71 16 12 15 4 4 ● DIN HT-12 145