Overall Thread Position on Shank Size of Length of length length basic dia. dia. square square L ℓ ℓg Ds K ℓk PT (for blind hole) Spiral Fluted Taps Hand Taps for Taper Pipe Threads, Long (ℓg) Type Specification (for through hole) Spiral Fluted Taps E PT 3/4 ~ Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Medium carbon steels 〜5 For icon explanation, refer to P.50 Hand Taps TYPE:1 TYPE:2 g g Carbide Taps Cemented Segment:1G Roll Taps Basic L ℓ ℓg Ds K ℓk No. of Size Class Code Chamfer major dia (mm) (mm) (mm) (mm) (mm) (mm) flutes Type Stock (mm) For Pipe Threads PT 1/16-28 Ⅱ TH2T01K-8 2.5P 7.723 55 19 13 8 6 9 4 1 ◎ PT 1/8-28 Ⅱ TH2T02K 2.5P 9.728 55 19 13 8 6 9 4 2 ◎ Simple Inspection Tools Special Thread Taps PT 1/4-19 Ⅱ TH2T04- 2.5P 13.157 62 28 21 11 9 12 4 2 ◎ PT 3/8-19 Ⅱ TH2T06- 2.5P 16.662 65 28 21 14 11 14 4 2 ◎ PT 1/2-14 Ⅱ TH2T08Q 2.5P 20.955 80 35 25 18 14 17 4 2 ◎ PT 5/8-14 Ⅱ TH2T10Q 2.5P 22.911 82 35 25 19 15 18 4 2 △ Pipe Taps PT 3/4-14 Ⅱ TH2T12Q 2.5P 26.441 85 35 25 23 17 20 4 2 ◎ PT 7/8-14 Ⅱ TH2T14Q 2.5P 30.201 90 40 28 24 19 22 4 2 △ PT 1 -11 Ⅱ TH2T16U 2.5P 33.249 95 45 32 26 21 24 5 2 ◎ PT 1 1/8-11 Ⅱ TH2T18U 2.5P 37.897 100 45 32 28 21 24 5 2 △ Thread Mills PT 1 1/4-11 Ⅱ TH2T20U 2.5P 41.910 105 45 32 32 26 30 5 2 ◎ PT 1 1/2-11 Ⅱ TH2T24U 2.5P 47.803 110 45 32 38 29 32 6 2 ◎ PT 1 3/4-11 Ⅱ TH2T28U 2.5P 53.746 115 45 32 42 32 35 6 2 △ PT 2 -11 Ⅱ TH2T32U 2.5P 59.614 120 50 35 46 35 38 6 2 ◎ PT 2 1/4-11 Ⅱ TH2T36U 2.5P 65.710 145 65 50 50 38 42 6 2 △ Dies PT 2 1/2-11 Ⅱ TH2T40U 2.5P 75.184 145 65 50 55 41 44 8 2 △ PT 3 -11 Ⅱ TH2T48U 2.5P 87.884 155 65 52 65 50 52 8 2 △ PT 3 1/2-11 Ⅱ TH2T56U 2.5P 100.330 165 68 52 70 54 58 8 2 △ PT 4 -11 Ⅱ TH2T64U 2.5P 113.030 170 70 55 75 58 62 10 2 △ Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order Pipe-2 For improvement, spec may change without advance notice. 551