Overall Thread Thread+Neck Shank Shank Size of Length of length length length length dia. square square L ℓ ℓn ℓs Ds K ℓk Segment:7B (for blind hole) Spiral Fluted Taps Size Class Code L ℓ ℓn ℓs Ds K ℓk Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) For Metric Threads M2 × 0.4 For Go ITM62.0EG 5.5 1 For Not-go 6H 42 12 27 3 2.5 5 △ ITM62.0EN 4.5 2 (for through hole) Spiral Fluted Taps M2 × 0.25 For Go ITM52.0BG 4 1 For Not-go 5H 42 12 27 3 2.5 5 △ ITM52.0BN 3.5 2 M2.2 × 0.45 For Go ITM62.2FG 5.5 1 For Not-go 6H 42 12 27 3 2.5 5 △ ITM62.2FN 4.5 2 (for through hole) Spiral Pointed Taps M2.2 × 0.25 For Go ITM52.2BG 4 1 For Not-go 5H 42 12 27 3 2.5 5 △ ITM52.2BN 3.5 2 M2.3 × 0.4 For Go ITM62.3EG 5.5 1 For Not-go 6H 42 12 27 3 2.5 5 △ ITM62.3EN 4.5 2 M2.3 × 0.25 For Go ITM52.3BG 4 1 Hand Taps For Not-go 5H 42 12 27 3 2.5 5 △ ITM52.3BN 3.5 2 M2.5 × 0.45 For Go ITM62.5FG 5.5 1 For Not-go 6H 46 14 29 3 2.5 5 △ ITM62.5FN 4.5 2 M2.5 × 0.35 For Go ITM62.5DG 4.5 1 Carbide Taps Cemented For Not-go 6H 46 14 29 3 2.5 5 △ ITM62.5DN 3.5 2 M2.6 × 0.45 For Go ITM62.6FG 5.5 1 For Not-go 6H 46 14 29 3 2.5 5 △ ITM62.6FN 4.5 2 M2.6 × 0.35 For Go ITM62.6DG 4.5 1 Roll Taps For Not-go 6H 46 14 29 3 2.5 5 △ ITM62.6DN 3.5 2 M3 × 0.5 For Go ITM63.0GG 5.5 1 For Not-go 6H 46 14 26 4 3.2 6 △ ITM63.0GN 4.5 2 M3 × 0.35 For Go ITM63.0DG 4.5 1 Simple Inspection Tools Special Thread Taps For Not-go 6H 46 14 26 4 3.2 6 △ ITM63.0DN 3.5 2 M3.5 × 0.6 For Go ITM63.5HG 7.5 1 For Not-go 6H 52 16 29 5 4 7 △ ITM63.5HN 6 2 M3.5 × 0.35 For Go ITM63.5DG 4.5 1 For Not-go 6H 52 16 29 5 4 7 △ Pipe Taps ITM63.5DN 3.5 2 M4 × 0.7 For Go ITM64.0IG 7.5 1 For Not-go 6H 52 17 29 5 4 7 △ ITM64.0IN 6 2 M4 × 0.5 For Go ITM64.0GG 7.5 1 For Not-go 6H 52 17 29 5 4 7 △ Thread Mills ITM64.0GN 6 2 M4.5 × 0.75 For Go ITM64.5JG 7.5 1 For Not-go 6H 60 21 33 5.5 4.5 7 △ ITM64.5JN 6 2 M4.5 × 0.5 For Go ITM64.5GG 7.5 1 For Not-go 6H 60 21 33 5.5 4.5 7 △ Dies ITM64.5GN 6 2 M5 × 0.8 For Go ITM65.0KG 10 1 For Not-go 6H 60 22 33 5.5 4.5 7 △ ITM65.0KN 6 2 M5 × 0.5 For Go ITM65.0GG 7 1 For Not-go 6H 60 22 33 5.5 4.5 7 △ ITM65.0GN 6 2 Center Drills M5.5 × 0.5 For Go ITM65.5GG 7 1 For Not-go 6H 62 26 33 6 4.5 7 △ ITM65.5GN 6 2 M6 × 1 For Go ITM66.0MG 10 1 For Not-go 6H 62 26 33 6 4.5 7 △ ITM66.0MN 6 2 Centering Tools M6 × 0.75 For Go ITM66.0JG 7.5 1 For Not-go 6H 62 26 33 6 4.5 7 △ ITM66.0JN 6 2 JIS ◎=Standard ○=Semi standard △=Made to order ST-4 For improvement, spec may change without advance notice. 527