Spiral Fluted Tap Series SP LH Spiral Fluted Taps for Left Hand Threads Spiral Fluted Taps (for blind hole) Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes M18 × 1.5 P2 SPQ018O--L 2.5P 100 33 - 51 14 11 14 4 2 △ M20 × 2.5 P3 SPR020R--L 2.5P 105 33 - 50 15 12 15 4 3 ○ M20 × 1.5 P3 SPR020O--L 2.5P 105 33 - 50 15 12 15 4 3 △ Spiral Fluted Taps (for through hole) M22 × 2.5 P3 SPR022R--L 2.5P 115 33 - 55 17 13 16 4 3 △ M22 × 1.5 P3 SPR022O--L 2.5P 115 33 - 55 17 13 16 4 3 △ M24 × 3 P3 SPR024S--L 2.5P 120 39 - 55 19 15 18 4 3 ○ M24 × 1.5 P3 SPR024O--L 2.5P 120 39 - 55 19 15 18 4 3 △ Spiral Pointed Taps (for through hole) M27 × 3 P3 SPR027S--L 2.5P 130 39 - 60 20 15 18 4 3 △ M30 × 3.5 P4 SPS030T--L 2.5P 135 46 - 62 23 17 20 4 3 △ M30 × 2 P3 SPR030Q--L 2.5P 135 46 - 62 23 17 20 4 3 △ M30 × 1.5 P3 SPR030O--L 2.5P 135 46 - 62 23 17 20 4 3 △ Hand Taps For Unified Threads Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes 1/4-20UNC P2 SPQU04N--L 2.5P 62 15 26 33 6 4.5 7 3 1 △ 1/4-28UNF P2 SPQU04K--L 2.5P 62 15 26 33 6 4.5 7 3 1 △ Cemented Carbide Taps 5/16-18UNC P2 SPQU05O--L 2.5P 70 19 - 36 6.2 5 8 3 2 △ 5/16-24UNF P2 SPQU05M--L 2.5P 70 19 - 36 6.2 5 8 3 2 △ 3/8-16UNC P2 SPQU06P--L 2.5P 75 23 - 38 7 5.5 8 3 2 △ 3/8-24UNF P2 SPQU06M--L 2.5P 75 23 - 38 7 5.5 8 3 2 △ 7/16-14UNC P3 SPRU07Q--L 2.5P 82 26 - 42 8.5 6.5 9 3 2 △ Roll Taps 7/16-20UNF P2 SPQU07N--L 2.5P 82 26 - 42 8.5 6.5 9 3 2 △ 1/2-13UNC P3 SPRU08R--L 2.5P 88 26 - 45 10.5 8 11 3 2 △ 1/2-20UNF P2 SPQU08N--L 2.5P 88 26 - 45 10.5 8 11 3 2 △ For Whitworth Threads Special Thread Taps Simple Inspection Tools Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes 1/4W20 P2 SPQW04N--L 2.5P 62 15 26 33 6 4.5 7 3 1 △ 5/16W18 P2 SPQW05O--L 2.5P 70 19 - 36 6.2 5 8 3 2 △ 3/8W16 P2 SPQW06P--L 2.5P 75 23 - 38 7 5.5 8 3 2 △ Pipe Taps 7/16W14 P3 SPRW07Q--L 2.5P 82 26 - 42 8.5 6.5 9 3 2 △ 1/2W12 P3 SPRW08S--L 2.5P 88 26 - 45 10.5 8 11 3 2 △ 5/8W11 P3 SPRW10U--L 2.5P 95 26 - 48 12.5 10 13 3 2 △ 3/4W10 P3 SPRW12V--L 2.5P 105 33 - 50 15 12 15 4 3 △ Thread Mills Dies Center Drills Centering Tools JIS SP-21 ◎=Standard ○=Semi standard △=Made to order 338 For improvement, spec may change without advance notice.