Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk PO Spiral Pointed Taps Oversize (for blind hole) Spiral Fluted Taps Segment:1E 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 POP1.2B 5P 36 4.5 - 24 3 2.5 5 2 1 ○ (for through hole) Spiral Fluted Taps P1 POP1.4C ◎ M1.4 × 0.3 P2 POQ1.4C 5P 36 5.4 - 24 3 2.5 5 2 1 ○ P3 POR1.4C △ P2 POQ1.6D ◎ M1.6 × 0.35 5P 36 6.3 - 24 3 2.5 5 2 2 (for through hole) Spiral Pointed Taps P3 POR1.6D △ P2 POQ1.7D ◎ M1.7 × 0.35 P3 POR1.7D 5P 36 6.3 - 24 3 2.5 5 2 2 ○ P4 POS1.7D △ M1.8 × 0.35 P2 POQ1.8D 5P 42 6.3 - 27 3 2.5 5 2 2 △ Hand Taps P2 POQ2.0E ◎ M2 × 0.4 P3 POR2.0E 5P 42 7.2 12 27 3 2.5 5 3 3 P4 POS2.0E ○ M2 × 0.25 P1 POP2.0B 5P 42 4.5 12 27 3 2.5 5 3 4 △ Carbide Taps Cemented M2.2 × 0.45 P2 POQ2.2F 5P 42 8.1 12 27 3 2.5 5 3 3 ○ M2.2 × 0.25 P2 POQ2.2B 5P 42 4.5 12 27 3 2.5 5 3 4 △ P2 POQ2.3E M2.3 × 0.4 P3 POR2.3E 5P 42 7.2 12 27 3 2.5 5 3 3 ○ P4 POS2.3E △ Roll Taps P2 POQ2.5F ◎ M2.5 × 0.45 P3 POR2.5F 5P 46 8.1 14 29 3 2.5 5 3 3 ○ P4 POS2.5F △ M2.5 × 0.35 P2 POQ2.5D 5P 46 6.3 14 29 3 2.5 5 3 4 △ Simple Inspection Tools Special Thread Taps P2 POQ2.6F ◎ M2.6 × 0.45 P3 POR2.6F 5P 46 8.1 14 29 3 2.5 5 3 3 ○ P4 POS2.6F △ M2.6 × 0.35 P2 POQ2.6D 5P 46 6.3 14 29 3 2.5 5 3 4 △ Pipe Taps P2 POQ3.0G ◎ M3 × 0.5 P3 POR3.0G 5P 46 9 14 26 4 3.2 6 3 3 P4 POS3.0G ○ 3M0.6 P2 POQ3.0H 5P 46 9 14 26 4 3.2 6 3 3 △ M3 × 0.35 P2 POQ3.0D 5P 46 6.5 14 26 4 3.2 6 3 4 △ Thread Mills P2 POQ3.5H ○ M3.5 × 0.6 P3 POR3.5H 5P 52 11 16 29 5 4 7 3 3 P4 POS3.5H △ M3.5 × 0.35 P2 POQ3.5D 5P 52 6.5 16 29 5 4 7 3 4 △ Dies P2 POQ4.0I ◎ M4 × 0.7 P3 POR4.0I 5P 52 11 17 29 5 4 7 3 3 P4 POS4.0I ○ 4M0.75 P2 POQ4.0J 5P 52 11 17 29 5 4 7 3 3 △ Center Drills M4 × 0.5 P2 POQ4.0G 5P 52 9 17 29 5 4 7 3 4 ○ M4.5 × 0.75 P2 POQ4.5J 5P 60 13 21 33 5.5 4.5 7 3 3 △ M4.5 × 0.5 P2 POQ4.5G 5P 60 9 21 33 5.5 4.5 7 3 4 △ P2 POQ5.0K ◎ M5 × 0.8 P3 POR5.0K 5P 60 13 22 33 5.5 4.5 7 3 3 Centering Tools P4 POS5.0K ○ 5M0.9 P2 POQ5.0L 5P 60 13 22 33 5.5 4.5 7 3 3 △ JIS ◎=Standard ○=Semi standard △=Made to order PO-4 For improvement, spec may change without advance notice. 397