Dimensions
| Thread $ d $ , in $ \mathrm{mm} $ | Dimension $ b $ , in $ \mathrm{mm} $ | Head diameter $ d_k $ , in $ \mathrm{mm} $ | Dimension $ k $ , in $ \mathrm{mm} $ | Dimension $ n $ , in $ \mathrm{mm} $ | Dimension $ r_1 $ max., in $ \mathrm{mm} $ | Dimension $ r_1 $ min., in $ \mathrm{mm} $ | Dimension $ t $ min., in $ \mathrm{mm} $ | Dimension $ t $ max., in $ \mathrm{mm} $ | Range of commercial lengths $ l $ nom., in $ \mathrm{mm} $ |
|---|---|---|---|---|---|---|---|---|---|
| M3 | 19 | 6 | 1.8 | 0.8 | 1.2 | 0.6 | 0.7 | 0.95 | 3, 4, 5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30 |
| (M3.5) | 20 | 7 | 2.1 | 0.8 | 1.4 | 0.7 | 0.8 | 1.1 | 4, 5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35 |
| M4 | 22 | 8 | 2.4 | 1 | 1.6 | 0.8 | 1 | 1.3 | 5, 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40 |
| M5 | 25 | 10 | 3 | 1.2 | 2 | 1 | 1.2 | 1.5 | 6, 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50 |
| M6 | 28 | 12 | 3.6 | 1.6 | 2.4 | 1.2 | 1.5 | 1.9 | 8, 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50 |
| (M8) | 34 | 16 | 4.8 | 2 | 3.2 | 1.6 | 1.9 | 2.4 | 10, 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50, 55 |
| (M10) | 40 | 20 | 6 | 2.5 | 4 | 2 | 2.4 | 3 | 12, (14), 16, (18), 20, (22), 25, (28), 30, 35, 40, 45, 50, 55, 60 |
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