Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk TYPE:1 DIN371 TYPE:2 DIN371 (for blind hole) Spiral Fluted Taps TYPE:3 DIN371 TYPE:4 DIN374 (for through hole) Spiral Fluted Taps (for through hole) Spiral Pointed Taps Segment:1J Hand Taps Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk Lobe Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) For Metric Threads Carbide Taps Cemented RD6.0MBOCTP 4P 1 M6 × 1 ISO2X 80 11 30 45 6 4.9 8 5 ● RD6.0MBOCTB 2P 2 RD8.0NBOCTP 4P M8 × 1.25 ISO2X 90 12 35 47 8 6.2 9 6 3 ● RD8.0NBOCTB 2P RD010OBOCTP 4P Roll Taps M10 × 1.5 ISO2X 100 13 39 52 10 8 11 8 3 ● RD010OBOCTB 2P RM010NBOCTP 4P M10 × 1.25 ISO2X 100 13 - 51 7 6.2 9 8 4 ● RM010NBOCTB 2P RM012OBOCTP 4P Simple Inspection Tools Special Thread Taps M12 × 1.5 ISO2X 100 15 - 51 9 7 10 8 4 ● RM012OBOCTB 2P RM012NBOCTP 4P M12 × 1.25 ISO2X 100 15 - 51 9 7 10 8 4 ● RM012NBOCTB 2P RM014OBOCTP 4P Pipe Taps M14 × 1.5 ISO2X 100 14 - 51 11 9 12 8 4 ● RM014OBOCTB 2P Number of oil grooves : M6 = 5, M8 = 6, M10 and larger = 8 Taps with 2 thread chamfer M6 and smaller : External centers on thread end are removed. Thread Mills Dies Center Drills Centering Tools DIN RO-10 175