Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk HT Straight Fluted and Hand Tap 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 TM045OANEBC 2.5P 180 31 - 92 36 29 32 4 11 M45 × 1.5 ISO2 TR045OANEB2 F 110 24 - 56 36 29 32 4 10 TR045OANEB5 V 110 24 - 56 36 29 32 4 10 TG048WANEBC 2.5P 250 65 - 128 36 29 32 4 9 (for through hole) Spiral Fluted Taps TQ048WANEB2 F 180 65 - 92 36 29 32 4 10 M48 × 5 ISO2 TQ048WANEBU M 180 65 - 92 36 29 32 4 10 TQ048WANEB5 V 180 65 - 92 36 29 32 4 10 TM048SANEBC 2.5P 225 49 - 115 36 29 32 4 11 (for through hole) Spiral Pointed Taps M48 × 3 ISO2 TR048SANEB2 F 140 39 - 71 36 29 32 4 10 TR048SANEB5 V 140 39 - 71 36 29 32 4 10 TM048QANEBC 2.5P 190 31 - 97 36 29 32 4 11 M48 × 2 ISO2 TR048QANEB2 F 140 39 - 71 36 29 32 4 10 TR048QANEB5 V 140 39 - 71 36 29 32 4 10 Fluted Taps Straight TM048OANEBC 2.5P 190 31 - 97 36 29 32 4 11 M48 × 1.5 ISO2 TR048OANEB2 F 140 39 - 71 36 29 32 4 10 TR048OANEB5 V 140 39 - 71 36 29 32 4 10 Size Class Code Chamfer L ℓ ℓn ℓs Ds K ℓk No. of Type Stock Carbide Taps Cemented (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Unified Threads No.4-40UNC 2B TDUN4HXNEBC 2.5P 56 9 18 34 3.5 2.7 6 3 3 No.4-48UNF 2B TDUN4FXNEBC 2.5P 56 9 18 34 3.5 2.7 6 3 3 No.5-40UNC 2B TDUN5HXNEBC 2.5P 56 11 18 34 3.5 2.7 6 3 3 Roll Taps No.5-44UNF 2B TDUN5GXNEBC 2.5P 56 11 18 34 3.5 2.7 6 3 3 No.6-32UNC 2B TDUN6JXNEBC 2.5P 56 11 19 32 4 3 6 3 3 No.6-40UNF 2B TDUN6HXNEBC 2.5P 56 11 19 32 4 3 6 3 3 No.8-32UNC 2B TDUN8JXNEBC 2.5P 63 13 21 38 4.5 3.4 6 3 3 Simple Inspection Tools Special Thread Taps No.8-36UNF 2B TDUN8IXNEBC 2.5P 63 13 21 38 4.5 3.4 6 3 3 No.10-24UNC 2B TDUNAMXNEBC 2.5P 70 14 24 39 6 4.9 8 3 3 No.10-32UNF 2B TDUNAJXNEBC 2.5P 70 14 24 39 6 4.9 8 3 3 No.12-24UNC 2B TDUNCMXNEBC 2.5P 80 15 28 45 6 4.9 8 3 3 Pipe Taps No.12-28UNF 2B TDUNCKXNEBC 2.5P 80 15 28 45 6 4.9 8 3 3 1/4-20UNC 2B TDU04NXNEBC 2.5P 80 15 30 42 7 5.5 8 3 3 1/4-28UNF 2B TDU04KXNEBC 2.5P 80 15 30 42 7 5.5 8 3 3 5/16-18UNC 2B TDU05OXNEBC 2.5P 90 19 35 47 8 6.2 9 4 8 5/16-24UNF 2B TMU05MXNEBC 2.5P 90 19 - 46 6 4.9 8 4 11 Thread Mills 3/8-16UNC 2B TDU06PXNEBC 2.5P 100 23 39 54 9 7 10 4 8 3/8-24UNF 2B TMU06MXNEBC 2.5P 100 23 - 51 7 5.5 8 4 11 7/16-14UNC 2B TGU07QXNEBC 2.5P 100 23 - 51 8 6.2 9 4 9 7/16-20UNF 2B TMU07NXNEBC 2.5P 100 23 - 51 8 6.2 9 4 11 Dies 1/2-13UNC 2B TGU08RXNEBC 2.5P 110 26 - 56 9 7 10 4 9 1/2-20UNF 2B TMU08NXNEBC 2.5P 100 21 - 51 9 7 10 4 11 9/16-12UNC 2B TGU09SXNEBC 2.5P 110 26 - 56 11 9 12 4 9 9/16-18UNF 2B TMU09OXNEBC 2.5P 100 21 - 51 11 9 12 4 11 Center Drills 5/8-11UNC 2B TGU10UXNEBC 2.5P 110 26 - 56 12 9 12 4 9 5/8-18UNF 2B TMU10OXNEBC 2.5P 100 21 - 51 12 9 12 4 11 3/4-10UNC 2B TGU12VXNEBC 2.5P 125 33 - 64 14 11 14 4 9 3/4-16UNF 2B TMU12PXNEBC 2.5P 110 24 - 56 14 11 14 4 11 7/8-9UNC 2B TGU14WXNEBC 2.5P 140 33 - 71 18 14.5 17 4 9 Centering Tools 7/8-14UNF 2B TMU14QXNEBC 2.5P 125 24 - 64 18 14.5 17 4 11 DIN HT-8 141