Special Thread Taps / Simple Inspection Tools Overall GO NOT-GO Recess Thread+Neck Shank Shank Size of Length of length part part length length length dia. square square L ℓ1 ℓ2 ℓ3 ℓn ℓs Ds K ℓk SITD Simple Thread Inspection Tools, Tandem Type Spiral Fluted Taps (for blind hole) Size Class Code L ℓ1 ℓ2 ℓ3 ℓn ℓs Ds K ℓk Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) M15 × 1 6H ITDM6015M 95 18.9 5 3 47 48 12.5 10 13 2 △ M16 × 2 6H ITDM6016Q 95 10 10 6 47 48 12.5 10 13 2 △ M16 × 1.5 6H ITDM6016O 95 14 7.5 4.5 47 48 12.5 10 13 2 △ Spiral Fluted Taps (for through hole) M16 × 1 6H ITDM6016M 95 18 5 3 47 48 12.5 10 13 2 △ M17 × 1.5 6H ITDM6017O 100 21.9 7.5 4.5 49 51 14 11 14 2 △ M17 × 1 6H ITDM6017M 100 25.9 5 3 49 51 14 11 14 2 △ M18 × 2.5 6H ITDM6018R 100 13 12.5 7.5 49 51 14 11 14 2 △ Spiral Pointed Taps (for through hole) M18 × 2 6H ITDM6018Q 100 17 10 6 49 51 14 11 14 2 △ M18 × 1.5 6H ITDM6018O 100 21 7.5 4.5 49 51 14 11 14 2 △ M18 × 1 6H ITDM6018M 100 25 5 3 49 51 14 11 14 2 △ For Unified Threads Hand Taps Size Class Code L ℓ1 ℓ2 ℓ3 ℓn ℓs Ds K ℓk Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) No.2-56UNC 2B ITDM2UN2E 42 4.4 2.3 1.4 12 26 3 2.5 5 1 △ No.2-64UNF 2B ITDM2UN2D 42 4.9 2 1.2 12 26 3 2.5 5 1 △ No.3-48UNC 2B ITDM2UN3F 46 3.9 2.6 1.6 14 28 3 2.5 5 1 △ Cemented Carbide Taps No.3-56UNF 2B ITDM2UN3E 46 4.4 2.3 1.4 14 28 3 2.5 5 1 △ No.4-40UNC 2B ITDM2UN4H 46 3.9 3.2 1.9 14 25 4 3.2 6 1 △ No.4-48UNF 2B ITDM2UN4F 46 4.8 2.6 1.6 14 25 4 3.2 6 1 △ No.5-40UNC 2B ITDM2UN5H 52 5.9 3.2 1.9 16 28 5 4 7 1 △ Roll Taps No.5-44UNF 2B ITDM2UN5G 52 6.4 2.9 1.7 16 28 5 4 7 1 △ No.6-32UNC 2B ITDM2UN6J 52 4.6 4 2.4 16 28 5 4 7 1 △ No.6-40UNF 2B ITDM2UN6H 52 5.9 3.2 1.9 16 28 5 4 7 1 △ No.8-32UNC 2B ITDM2UN8J 60 6.6 4 2.4 21 32 5.5 4.5 7 1 △ No.8-36UNF 2B ITDM2UN8I 60 7.4 3.5 2.1 21 32 5.5 4.5 7 1 △ Special Thread Taps Simple Inspection Tools No.10-24UNC 2B ITDM2UNAM 62 7.5 5.3 3.2 26 32 6 4.5 7 1 △ No.10-32UNF 2B ITDM2UNAJ 62 9.6 4 2.4 26 32 6 4.5 7 1 △ No.12-24UNC 2B ITDM2UNCM 62 6.5 5.3 3.2 26 32 6 4.5 7 1 △ No.12-28UNF 2B ITDM2UNCK 62 7.8 4.5 2.7 26 32 6 4.5 7 1 △ Pipe Taps 1/4-20UNC 2B ITDM2U04N 70 10.2 6.4 3.8 34 36 6.2 5 8 2 △ 1/4-28UNF 2B ITDM2U04K 70 13.2 4.5 2.7 34 36 6.2 5 8 2 △ 5/16-18UNC 2B ITDM2U05O 70 7.7 7.1 4.2 34 36 6.2 5 8 2 △ 5/16-24UNF 2B ITDM2U05M 70 10.5 5.3 3.2 34 36 6.2 5 8 2 △ Thread Mills 3/8-16UNC 2B ITDM2U06P 75 10.7 7.9 4.8 37 38 7 5.5 8 2 △ 3/8-24UNF 2B ITDM2U06M 75 14.9 5.3 3.2 37 38 7 5.5 8 2 △ 7/16-14UNC 2B ITDM2U07Q 82 12.3 9.1 5.4 40 42 8.5 6.5 9 2 △ 7/16-20UNF 2B ITDM2U07N 82 16.6 6.4 3.8 40 42 8.5 6.5 9 2 △ Dies 1/2-13UNC 2B ITDM2U08R 88 11.4 9.8 5.9 43 45 10.5 8 11 2 △ 1/2-20UNF 2B ITDM2U08N 88 16.9 6.4 3.8 43 45 10.5 8 11 2 △ 9/16-12UNC 2B ITDM2U09S 95 10.5 10.6 6.4 47 48 12.5 10 13 2 △ 9/16-18UNF 2B ITDM2U09O 95 16.2 7.1 4.2 47 48 12.5 10 13 2 △ Center Drills 5/8-11UNC 2B ITDM2U10U 100 16.4 11.5 6.9 49 51 14 11 14 2 △ 5/8-18UNF 2B ITDM2U10O 100 23.5 7.1 4.2 49 51 14 11 14 2 △ Centering Tools JIS ST-11 ◎=Standard ○=Semi standard △=Made to order 534 For improvement, spec may change without advance notice.