Overall Thread Position on Shank Size of Length of length length basic dia. dia. square square L ℓ ℓg Ds K ℓk FC-PT (for blind hole) Spiral Fluted Taps Hand Taps for Taper Pipe Threads, Long (ℓg) Type, for Cast Irons Specification (for through hole) Spiral Fluted Taps ■FC-PT is suitable for hard and abrasive materials such as E cast irons. Nitride PT 3/4 ~ Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Cast irons Ductile cast irons 〜5 〜5 (m/min) (m/min) 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 FCPT01K-8 2.5P 7.723 55 19 13 8 6 9 4 1 △ PT 1/8-28 Ⅱ FCPT02K 2.5P 9.728 55 19 13 8 6 9 4 2 △ Simple Inspection Tools Special Thread Taps PT 1/4-19 Ⅱ FCPT04- 2.5P 13.157 62 28 21 11 9 12 4 2 △ PT 3/8-19 Ⅱ FCPT06- 2.5P 16.662 65 28 21 14 11 14 4 2 △ PT 1/2-14 Ⅱ FCPT08Q 2.5P 20.955 80 35 25 18 14 17 4 2 △ PT 3/4-14 Ⅱ FCPT12Q 2.5P 26.441 85 35 25 23 17 20 4 2 △ Pipe Taps PT 1 -11 Ⅱ FCPT16U 2.5P 33.249 95 45 32 26 21 24 5 2 △ PT 1 1/4-11 Ⅱ FCPT20U 2.5P 41.910 105 45 32 32 26 30 5 2 △ PT 1 1/2-11 Ⅱ FCPT24U 2.5P 47.803 110 45 32 38 29 32 6 2 △ PT 2 -11 Ⅱ FCPT32U 2.5P 59.614 120 50 35 46 35 38 6 2 △ Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order Pipe-22 For improvement, spec may change without advance notice. 571