| Dimensions in mm – source DIN 9021
Publication date: 03-1990 Replaces DIN 9021: 07-1974 |
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| Thread size | d nom=min | d1 nom=max | s nom | ≈ weigth in kg x1000 pcs, (ρ=7,85 kg/dm3) |
| M 2.5 | 2.7 | 8 | 0.8 | 0.28 |
| M 3 | 3.2 | 9 | 0.8 | 0.349 |
| M3.5 | 3.7 | 11 | 0.8 | 0.529 |
| M 4 | 4.3 | 12 | 1 | 0.774 |
| M 5 | 5.3 | 15 | 1.2 | 1.46 |
| M 6 | 6.4 | 18 | 1.6 | 2.79 |
| M 7 | 7.4 | 22 | 2 | 5.29 |
| M 8 | 8.4 | 24 | 2 | 6.23 |
| M 10 | 10.5 | 30 | 2.5 | 12.2 |
| M 12 | 13 | 37 | 3 | 22.2 |
| M 14 | 15 | 44 | 3 | 31.6 |
| M 16 | 17 | 50 | 3 | 40.9 |
| M 18 | 20 | 56 | 4 | 67.4 |
| M 20 | 22 | 60 | 4 | 76.8 |
| M 24 | 26 | 72 | 5 | 139 |
| M 30 | 33 | 92 | 6 | 273 |
| M 36 | 39 | 110 | 8 | 522 |
| Dimensions in mm – source UNI 6593
Publication date: 1997 |
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| Thread size | d nom=min | d1 nom=max | s nom | |
| M 3 | 3.2 | 9 | 0.8 | |
| 3.2 | 12 | 1 | ||
| M 4 | 4.3 | 12 | 1 | |
| 4.5 | 12 | 1.5 | ||
| 4.3 | 16 | 1.5 | ||
| M 5 | 5.5 | 15 | 1.5 | |
| 5.3 | 20 | 1.5 | ||
| M 6 | 6.5 | 18 | 1.5 | |
| 6.5 | 18 | 2 | ||
| 6.5 | 24 | 2 | ||
| M 7 | 7.6 | 21 | 2 | |
| 7.5 | 28 | 2 | ||
| M 8 | 8.5 | 24 | 2 | |
| 78.5 | 32 | 2.5 | ||
| M 9 | 9.6 | 27 | 2.5 | |
| 9.6 | 36 | 2.5 | ||
| M 10 | 10.5 | 30 | 2.5 | |
| 10.5 | 40 | 2.5 | ||
| M 12 | 13 | 36 | 2.5 | |
| 13 | 48 | 2.5 | ||
| M 14 | 14.5 | 36 | 2.5 | |
| 15 | 42 | 2.5 | ||
| 15 | 56 | 3 | ||
| M 16 | 17 | 48 | 3 | |
| 16.5 | 64 | 3 | ||
| M 18 | 18.5 | 48 | 4 | |
| 18.3 | 64 | 5 | ||
| 19 | 55 | 4 | ||
| 19 | 72 | 4 | ||
| M 20 | 21 | 60 | 4 | |
| 21.5 | 80 | 5 | ||
