Overall Thread Position on Shank Size of Length of length length basic dia. dia. square square L ℓ ℓg Ds K ℓk LS-NPTF (for blind hole) Spiral Fluted Taps Long Shank Hand Taps for American Dryseal Taper Pipe Threads Specification (for through hole) Spiral Fluted Taps E NPTF 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 American Pipe Threads NPTF 1/16-27 ANSI G TNTF01LL10 3P 7.770 100 17 12 8 6 9 4 1 △ TNTF02LL10 100 Simple Inspection Tools Special Thread Taps NPTF 1/8-27 ANSI G 3P 10.117 19 12.05 8 6 9 4 2 △ TNTF02LL15 150 TNTF04OL10 100 NPTF 1/4-18 ANSI G 3P 13.426 28 17.45 11 9 12 4 2 △ TNTF04OL15 150 TNTF06OL10 100 Pipe Taps NPTF 3/8-18 ANSI G 3P 16.866 28 17.65 14 11 14 4 2 △ TNTF06OL15 150 NPTF 1/2-14 ANSI G TNTF08QL15 3P 20.980 150 35 22.85 18 14 17 4 2 △ NPTF 3/4-14 ANSI G TNTF12QL15 3P 26.325 150 35 22.95 23 17 20 4 2 △ NPTF 1 -11.5 ANSI G TNTF16TL15 3P 32.934 150 45 27.4 26 21 24 5 2 △ Thread Mills Dies Center Drills Centering Tools JIS ◎=Standard ○=Semi standard △=Made to order Pipe-50 For improvement, spec may change without advance notice. 599