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+RS/N-RS Thread Forming Taps for Non-Ferrous Materials Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk Lobe Type Stock (for blind hole) Spiral Fluted Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) NRSM6UN4FP 4P No.4-48UNF G6 46 9 14 26 4 3.2 6 4 4 △ NRSM6UN4FB 2P NRSM5UN6JP 4P G5 (for through hole) Spiral Fluted Taps NRSM5UN6JB 2P NRSM6UN6JP 4P No.6-32UNC G6 52 11 16 29 5 4 7 4 4 △ NRSM6UN6JB 2P NRSM7UN6JP 4P G7 NRSM7UN6JB 2P (for through hole) Spiral Pointed Taps NRSM5UN6HP 4P No.6-40UNF G5 52 11 16 29 5 4 7 4 4 △ NRSM5UN6HB 2P NRSM6UN8JP 4P G6 NRSM6UN8JB 2P No.8-32UNC NRSM7UN8JP 4P 60 13 21 33 5.5 4.5 7 4 4 △ Hand Taps G7 NRSM7UN8JB 2P G8 NRSM8UN8JP 4P NRSM5UN8IP 4P G5 Carbide Taps Cemented No.8-36UNF NRSM5UN8IB 60 13 21 33 5.5 4.5 7 4 4 △ 2P G6 NRSM6UN8IB NRSM6UNAMP 4P G6 NRSM6UNAMB 2P No.10-24UNC 60 13 22 33 5.5 4.5 7 4 4 △ NRSM7UNAMP 4P Roll Taps G7 NRSM7UNAMB 2P NRSM6UNAJP 4P G6 NRSM6UNAJB 2P No.10-32UNF 60 13 22 33 5.5 4.5 7 4 4 △ NRSM7UNAJP 4P Simple Inspection Tools Special Thread Taps G7 NRSM7UNAJB 2P NRSM6U04NP 4P G6 NRSM6U04NB 2P 1/4-20UNC 62 15 26 33 6 4.5 7 4 4 △ NRSM7U04NP 4P G7 Pipe Taps NRSM7U04NB 2P NRSM6U04KP 4P 1/4-28UNF G6 62 15 26 33 6 4.5 7 4 4 △ NRSM6U04KB 2P For Helical Coil Wire Screw Thread Inserts, for Metric Threads Size Class Code Chamfer Basic major dia L ℓ ℓn ℓs Ds K ℓk Lobe Type Stock Thread Mills (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) RW3.0G3LENP 4P STI M3 × 0.5 G3 3.65 52 7.5 17 29 5 4 7 4 4 △ RW3.0G3LENB 2P RW4.0I4LENP 4P STI M4 × 0.7 G4 4.909 60 13 22 33 5.5 4.5 7 4 4 △ Dies RW4.0I4LENB 2P RW5.0K4LENP 4P STI M5 × 0.8 G4 6.039 62 15 26 33 6 4.5 7 4 4 △ RW5.0K4LENB 2P RW6.0M4LENP 4P STI M6 × 1 G4 7.299 70 19 - 36 6.2 5 8 4 6 △ RW6.0M4LENB 2P Center Drills STI M8 × 1.25 G4 RW8.0N4LENB 2P 9.624 75 23 - 38 7 5.5 8 6 6 △ STI M10 × 1.5 G5 RW010O5LENB 2P 11.948 82 26 - 42 8.5 6.5 9 6 6 △ STI M12 × 1.75 G6 RW012P6LENB 2P 14.273 95 26 - 48 12.5 10 13 6 6 △ Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order RO-12 For improvement, spec may change without advance notice. 507