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 SP Spiral Fluted Taps Oversize (for blind hole) Spiral Fluted Taps Segment:1C Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M1.2 × 0.25 P1 SPP1.2B 2.5P 36 4.5 - 24 3 2.5 5 2 1 ○ (for through hole) Spiral Fluted Taps M1.4 × 0.3 P1 SPP1.4C 2.5P 36 5.4 - 24 3 2.5 5 2 1 ◎ M1.6 × 0.35 P1 SPP1.6D 2.5P 36 6.3 - 24 3 2.5 5 2 2 ◎ P1 SPP1.7D ◎ M1.7 × 0.35 P2 SPQ1.7D 2.5P 36 6.3 - 24 3 2.5 5 2 2 ○ P3 SPR1.7D △ (for through hole) Spiral Pointed Taps M1.8 × 0.35 P1 SPP1.8D 2.5P 42 6.3 - 27 3 2.5 5 2 2 △ P1 SPP2.0E ◎ P2 SPQ2.0E ○ M2 × 0.4 2.5P 42 7.2 12 27 3 2.5 5 2 3 P3 SPR2.0E ◎ Hand Taps P4 SPS2.0E △ M2 × 0.25 P1 SPP2.0B 2.5P 42 4.5 12 27 3 2.5 5 2 4 ○ P1 SPP2.2F ○ M2.2 × 0.45 2.5P 42 8.1 12 27 3 2.5 5 2 3 P3 SPR2.2F △ Carbide Taps Cemented P1 SPP2.3E ○ P2 SPQ2.3E M2.3 × 0.4 2.5P 42 7.2 12 27 3 2.5 5 2 3 P3 SPR2.3E △ P4 SPS2.3E M2.3 × 0.25 P1 SPP2.3B 2.5P 42 4.5 12 27 3 2.5 5 2 4 △ Roll Taps P1 SPP2.5F ◎ P2 SPQ2.5F M2.5 × 0.45 2.5P 46 8.1 14 29 3 2.5 5 2 3 P3 SPR2.5F ○ P4 SPS2.5F Simple Inspection Tools Special Thread Taps M2.5 × 0.35 P1 SPP2.5D 2.5P 46 6.3 14 29 3 2.5 5 2 4 ○ P1 SPP2.6F ◎ P2 SPQ2.6F M2.6 × 0.45 2.5P 46 8.1 14 29 3 2.5 5 2 3 ○ P3 SPR2.6F Pipe Taps P4 SPS2.6F △ M2.6 × 0.35 P1 SPP2.6D 2.5P 46 6.3 14 29 3 2.5 5 2 4 △ P1 SPP3.0G ◎ P2 SPQ3.0G M3 × 0.5 2.5P 46 9 14 26 4 3.2 6 3 3 Thread Mills P3 SPR3.0G ○ P4 SPS3.0G 3M0.6 P1 SPP3.0H 2.5P 46 9 14 26 4 3.2 6 3 3 △ M3 × 0.35 P1 SPP3.0D 2.5P 46 6.5 14 26 4 3.2 6 3 4 ○ P1 SPP3.5H ○ Dies P2 SPQ3.5H M3.5 × 0.6 2.5P 52 11 16 29 5 4 7 3 3 P3 SPR3.5H △ P4 SPS3.5H M3.5 × 0.35 P1 SPP3.5D 2.5P 52 6.5 16 29 5 4 7 3 4 △ Center Drills P2 SPQ4.0I ◎ M4 × 0.7 P3 SPR4.0I 2.5P 52 11 17 29 5 4 7 3 3 P4 SPS4.0I ○ 4M0.75 P2 SPQ4.0J 2.5P 52 11 17 29 5 4 7 3 3 ○ M4 × 0.5 P1 SPP4.0G 2.5P 52 9 17 29 5 4 7 3 4 ○ Centering Tools M4.5 × 0.75 P2 SPQ4.5J 2.5P 60 13 21 33 5.5 4.5 7 3 3 △ M4.5 × 0.5 P1 SPP4.5G 2.5P 60 9 21 33 5.5 4.5 7 3 4 △ M5 × 0.8 P2 SPQ5.0K 2.5P 60 13 22 33 5.5 4.5 7 3 3 ◎ JIS ◎=Standard ○=Semi standard △=Made to order SP-4 For improvement, spec may change without advance notice. 321