Overall Chamfer+ Thread Thread+Neck Shank Shank Size of Length of length full thread length length length dia. square square L ℓt ℓ ℓn ℓs Ds K ℓk LS-SP Long Shank Spiral Fluted Taps Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (for blind hole) Spiral Fluted Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes SPQ016OL15 150 ○ M16 × 1.5 P2 2.5P 26 - 60 12.5 10 13 3 2 SPQ016OL20 200 △ SPR018RL15 150 ○ M18 × 2.5 P3 SPR018RL20 2.5P 200 33 - 70 14 11 14 4 2 (for through hole) Spiral Fluted Taps SPR018RL25 250 △ SPQ018OL15 150 ○ M18 × 1.5 P2 2.5P 33 - 70 14 11 14 4 2 SPQ018OL20 200 △ SPR020RL15 150 (for through hole) Spiral Pointed Taps M20 × 2.5 P3 SPR020RL20 2.5P 200 33 - 70 15 12 15 4 3 ◎ SPR020RL25 250 △ SPR020OL15 150 ○ M20 × 1.5 P3 2.5P 33 - 70 15 12 15 4 3 SPR020OL20 200 △ SPR022RL15 150 Hand Taps M22 × 2.5 P3 2.5P 33 - 70 17 13 16 4 3 △ SPR022RL20 200 SPR022OL15 150 ○ M22 × 1.5 P3 2.5P 33 - 70 17 13 16 4 3 SPR022OL20 200 △ SPR024SL15 150 ○ Carbide Taps Cemented M24 × 3 P3 SPR024SL20 2.5P 200 39 - 80 19 15 18 4 3 ◎ SPR024SL25 250 △ M24 × 2 P3 SPR024QL20 2.5P 200 39 - 80 19 15 18 4 3 △ SPR024OL15 150 ○ Roll Taps M24 × 1.5 P3 2.5P 39 - 80 19 15 18 4 3 SPR024OL20 200 △ SPR027SL20 200 M27 × 3 P3 2.5P 39 - 80 20 15 18 4 3 △ SPR027SL25 250 M27 × 2 P3 SPR027QL20 2.5P 200 39 - 80 20 15 18 4 3 △ SPR027OL20 200 Simple Inspection Tools Special Thread Taps M27 × 1.5 P3 2.5P 39 - 80 20 15 18 4 3 △ SPR027OL25 250 SPS030TL20 200 M30 × 3.5 P4 SPS030TL25 2.5P 250 46 - 80 23 17 20 4 3 △ SPS030TL30 300 Pipe Taps SPR030OL20 200 M30 × 1.5 P3 2.5P 46 - 80 23 17 20 4 3 △ SPR030OL25 250 For Unified Threads Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock Thread Mills (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes SPQU04NL10 100 1/4-20UNC P2 2.5P 15 26 40 6 4.5 7 3 1 △ SPQU04NL15 150 SPQU04KL10 100 1/4-28UNF P2 2.5P 15 26 40 6 4.5 7 3 1 △ SPQU04KL15 150 Dies SPQU05OL10 100 5/16-18UNC P2 2.5P 19 - 50 6.2 5 8 3 2 △ SPQU05OL15 150 SPQU05ML10 100 5/16-24UNF P2 2.5P 19 - 50 6.2 5 8 3 2 △ SPQU05ML15 150 Center Drills SPQU06PL10 100 3/8-16UNC P2 SPQU06PL15 2.5P 150 23 - 50 7 5.5 8 3 2 △ SPQU06PL20 200 SPQU06ML10 100 3/8-24UNF P2 2.5P 23 - 50 7 5.5 8 3 2 △ Centering Tools SPQU06ML15 150 7/16-14UNC P3 SPRU07QL15 2.5P 150 26 - 50 8.5 6.5 9 3 2 △ 7/16-20UNF P2 SPQU07NL15 2.5P 150 26 - 50 8.5 6.5 9 3 2 △ JIS ◎=Standard ○=Semi standard △=Made to order SP-28 For improvement, spec may change without advance notice. 345