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 TYPE:1 TYPE:2 (for blind hole) Spiral Fluted Taps (for through hole) Spiral Fluted Taps Segment:1C (for through hole) Spiral Pointed Taps Size Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M3 × 0.5 SI73.0G 2.5P 46 9 14 26 4 3.2 6 3 1 ◎ M4 × 0.7 SI74.0I 2.5P 52 11 17 29 5 4 7 3 1 ◎ Hand Taps M5 × 0.8 SI75.0K 2.5P 60 13 22 33 5.5 4.5 7 3 1 ◎ M6 × 1 SI76.0M 2.5P 62 15 26 33 6 4.5 7 3 1 ◎ M8 × 1.25 SI78.0N 2.5P 70 19 - 36 6.2 5 8 3 2 ◎ M10 × 1.5 SI7010O 2.5P 75 23 - 38 7 5.5 8 3 2 ◎ Carbide Taps Cemented Roll Taps Blister Pack Size Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock Simple Inspection Tools Special Thread Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M3 × 0.5 SI73.0GBP 2.5P 46 9 14 26 4 3.2 6 3 1 ◎ M4 × 0.7 SI74.0IBP 2.5P 52 11 17 29 5 4 7 3 1 ◎ M5 × 0.8 SI75.0KBP 2.5P 60 13 22 33 5.5 4.5 7 3 1 ◎ Pipe Taps M6 × 1 SI76.0MBP 2.5P 62 15 26 33 6 4.5 7 3 1 ◎ M8 × 1.25 SI78.0NBP 2.5P 70 19 - 36 6.2 5 8 3 2 ◎ M10 × 1.5 SI7010OBP 2.5P 75 23 - 38 7 5.5 8 3 2 ◎ Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order SP-2 For improvement, spec may change without advance notice. 319