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 AL+SP/AL-SP Spiral Fluted Taps for Aluminum Basic major L ℓ ℓn ℓs Ds K ℓk No. of (for blind hole) Spiral Fluted Taps Size Class Code Chamfer dia (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes Type Stock (mm) For Helical Coil Wire Screw Thread Inserts, for Metric Threads STI M3 × 0.5 1b SW3.0G1LEN 2.5P 3.65 52 7.5 17 29 5 4 7 3 1 ○ STI M4 × 0.7 1b SW4.0I1LEN 2.5P 4.909 60 13 22 33 5.5 4.5 7 3 1 ○ STI M5 × 0.8 1b SW5.0K1LEN 2.5P 6.039 62 15 26 33 6 4.5 7 3 1 ○ (for through hole) Spiral Fluted Taps STI M6 × 1 1b SW6.0M1LEN 2.5P 7.299 70 19 - 36 6.2 5 8 3 2 ○ STI M8 × 1.25 1b SW8.0N1LEN 2.5P 9.624 75 23 - 38 7 5.5 8 3 2 ○ STI M10 × 1.5 1b SW010O1LEN 2.5P 11.948 82 26 - 42 8.5 6.5 9 3 2 ○ STI M10 × 1.25 1b SW010N1LEN 2.5P 11.624 82 26 - 42 8.5 6.5 9 3 2 △ (for through hole) Spiral Pointed Taps STI M12 × 1.75 1b SW012P1LEN 2.5P 14.273 95 26 - 48 12.5 10 13 3 2 ○ STI M12 × 1.5 1b SW012O1LEN 2.5P 13.948 88 26 - 45 10.5 8 11 3 2 △ STI M12 × 1.25 1b SW012N1LEN 2.5P 13.624 88 26 - 45 10.5 8 11 3 2 △ STI M14 × 2 1b SW014Q1LEN 2.5P 16.598 100 33 - 51 14 11 14 3 2 △ Hand Taps STI M14 × 1.5 1b SW014O1LEN 2.5P 15.948 95 26 - 48 12.5 10 13 3 2 △ STI M16 × 2 1b SW016Q1LEN 2.5P 18.598 105 33 - 50 15 12 15 4 3 ○ STI M16 × 1.5 1b SW016O1LEN 2.5P 17.948 100 33 - 51 14 11 14 4 3 △ STI M18 × 2.5 1b SW018R1LEN 2.5P 21.248 115 33 - 55 17 13 16 4 3 △ STI M18 × 1.5 1b SW018O1LEN 2.5P 19.948 105 33 - 50 15 12 15 4 3 △ Carbide Taps Cemented STI M20 × 2.5 1b SW020R1LEN 2.5P 23.248 120 39 - 55 19 15 18 4 3 ○ STI M20 × 1.5 1b SW020O1LEN 2.5P 21.948 115 33 - 55 17 13 16 4 3 △ STI M22 × 2.5 1b SW022R1LEN 2.5P 25.248 125 39 - 58 19 15 18 4 3 △ STI M24 × 3 1b SW024S1LEN 2.5P 27.897 135 46 - 62 23 17 20 4 3 ○ Roll Taps Simple Inspection Tools Special Thread Taps Pipe Taps Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order SP-50 For improvement, spec may change without advance notice. 367