Overall Thread Position on Shank Size of Length of length length basic dia. dia. square square L ℓ ℓg Ds K ℓk S-PT LH (for blind hole) Spiral Fluted Taps Hand Taps for Taper Pipe Threads, Short (ℓg) Type, for LH Threads Specification (for through hole) Spiral Fluted Taps E Left hand PT 3/4 ~ Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Medium carbon steels TYPE:1 〜5 For icon explanation, refer to P.50 Hand Taps g Segment:1G Carbide Taps Cemented 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 1/8-28 Ⅱ TSPT02K--L 2.5P 9.728 55 16.5 10.5 8 6 9 4 1 △ PT 1/4-19 Ⅱ TSPT04---L 2.5P 13.157 62 19.5 12.5 11 9 12 4 1 △ Roll Taps PT 3/8-19 Ⅱ TSPT06---L 2.5P 16.662 65 21 14 14 11 14 4 1 △ PT 1/2-14 Ⅱ TSPT08Q--L 2.5P 20.955 80 27 17 18 14 17 4 1 △ PT 3/4-14 Ⅱ TSPT12Q--L 2.5P 26.441 85 29 19 23 17 20 4 1 △ PT 1 -11 Ⅱ TSPT16U--L 2.5P 33.249 95 35 22 26 21 24 5 1 △ Simple Inspection Tools Special Thread Taps PT 1 1/4-11 Ⅱ TSPT20U--L 2.5P 41.910 105 37.5 24.5 32 26 30 5 1 △ PT 1 1/2-11 Ⅱ TSPT24U--L 2.5P 47.803 110 38.5 25.5 38 29 32 6 1 △ PT 2 -11 Ⅱ TSPT32U--L 2.5P 59.614 120 42.5 27.5 46 35 38 6 1 △ Pipe Taps Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order Pipe-6 For improvement, spec may change without advance notice. 555