Metric Bolts - Head and Wrench Sizes
ANSI/SO, DIN and JIS
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ANSI/SO, DIN and JIS metric bolt head and wrench sizes are indicated below:
| Bolt Diameter (mm) |
Head/Wrench Size (mm) | ||
| ANSI/ISO | DIN | JIS | |
| 4 | 7 | 7 | 7 |
| 5 | 8 | 8 | 8 |
| 6 | 10 | 10 | 10 |
| 7 | 11 | ||
| 8 | 13 | 13 | 12 |
| 10 | 16 | 17 | 14 |
| 12 | 18 | 19 | 17 |
| 14 | 21 | 22 | 19 |
| 16 | 24 | 24 | 22 |
| 18 | 27 | ||
| 20 | 30 | 30 | |
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