Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk N-CT-PO (for blind hole) Spiral Fluted Taps Spiral Pointed Carbide Taps Specification (for through hole) Spiral Fluted Taps Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Wrought aluminum Aluminum alloy castings 10〜20 10〜20 TYPE:1 (m/min) (m/min) For icon explanation, refer to P.50 Hand Taps TYPE:2 TYPE:3 Carbide Taps Cemented Roll Taps Segment:1L Size Class Code Chamfer L ℓ ℓn Ds K ℓk No. of Type Stock Simple Inspection Tools Special Thread Taps (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M3 × 0.5 P3 PCNR3.0G 5P 46 11 - 4 3.2 6 3 1 △ M4 × 0.7 P3 PCNR4.0I 5P 52 13 - 5 4 7 3 1 △ M5 × 0.8 P3 PCNR5.0K 5P 60 16 - 5.5 4.5 7 3 1 △ Pipe Taps M6 × 1 P3 PCNR6.0M 5P 62 19 - 6 4.5 7 3 2 △ M8 × 1.25 P3 PCNR8.0N 5P 70 22 - 6.2 5 8 3 3 △ M10 × 1.5 P4 PCNS010O 5P 75 24 - 7 5.5 8 3 3 △ M12 × 1.75 P4 PCNS012P 5P 82 30 - 8.5 6.5 9 3 3 △ Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order CT-8 For improvement, spec may change without advance notice. 485