Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk HP+RZ/HP-RZ High Performance Thread Forming Taps, Coated Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk Lobe Type Stock (for blind hole) Spiral Fluted Taps (mm) (mm) (mm) (mm) (mm) (mm) (mm) ISO2X RD010OBFPTB 2P 100 23 39 52 10 8 11 8 3 ● M10 × 1.5 ISO3X RD010ONFPTB 2P 100 23 39 52 10 8 11 8 3 ● M10 × 1.25 ISO2X RM010NBFPTB 2P 100 23 - 51 7 5.5 8 8 4 ● ISO2X RG012PBFPTB 2P 110 26 - 56 9 7 10 8 5 ● (for through hole) Spiral Fluted Taps M12 × 1.75 ISO3X RG012PNFPTB 2P 110 26 - 56 9 7 10 8 5 ● M12 × 1.5 ISO2X RM012OBFPTB 2P 100 21 - 51 9 7 10 8 4 ● M12 × 1.25 ISO2X RM012NBFPTB 2P 100 21 - 51 9 7 10 8 4 ● M14 × 2 ISO2X RG014QBFPTB 2P 110 26 - 56 11 9 12 8 5 ● (for through hole) Spiral Pointed Taps M14 × 1.5 ISO2X RM014OBFPTB 2P 100 21 - 51 11 9 12 8 4 ● M16 × 2 ISO2X RG016QBFPTB 2P 110 26 - 56 12 9 12 8 5 ● M16 × 1.5 ISO2X RM016OBFPTB 2P 100 21 - 51 12 9 12 8 4 ● Number of oil grooves : M2.5 and smaller = non, M3 ~ M6 = 2, M8 = 3, M10 and larger =4 Hand Taps Taps for M6 and smaller : External centers on thread end are removed. Carbide Taps Cemented Roll Taps Simple Inspection Tools Special Thread Taps Pipe Taps Thread Mills Dies Center Drills Centering Tools DIN RO-8 173