Overall Thread Position on Shank Size of Length of length length basic dia. dia. square square L ℓ ℓg Ds K ℓk SP-S-PT (for blind hole) Spiral Fluted Taps Spiral Fluted Taps for Taper Pipe Threads, Short (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 ow 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 SSPT02K 2.5P 9.728 55 16.5 10.5 8 6 9 3 1 ○ PT 1/4-19 Ⅱ SSPT04- 2.5P 13.157 62 19.5 12.5 11 9 12 3 1 ○ Roll Taps PT 3/8-19 Ⅱ SSPT06- 2.5P 16.662 65 21 14 14 11 14 3 1 ○ PT 1/2-14 Ⅱ SSPT08Q 2.5P 20.955 80 27 17 18 14 17 4 1 ○ PT 3/4-14 Ⅱ SSPT12Q 2.5P 26.441 85 29 19 23 17 20 4 1 ○ PT 1 -11 Ⅱ SSPT16U 2.5P 33.249 95 35 22 26 21 24 4 1 ○ Simple Inspection Tools Special Thread Taps PT 1 1/4-11 Ⅱ SSPT20U 2.5P 41.910 105 37.5 24.5 32 26 30 4 1 △ PT 1 1/2-11 Ⅱ SSPT24U 2.5P 47.803 110 38.5 25.5 38 29 32 4 1 △ PT 2 -11 Ⅱ SSPT32U 2.5P 59.614 120 42.5 27.5 46 35 38 4 1 △ Pipe Taps Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order Pipe-10 For improvement, spec may change without advance notice. 559