7 C.F.R. § 51.2854
Metric conversion table
| Inches | Millimeters (mm) |
|---|---|
| 1⁄8 | 3.2 |
| 1⁄4 | 6.4 |
| 3⁄8 | 9.5 |
| 1⁄2 | 12.7 |
| 5⁄8 | 15.9 |
| 3⁄4 | 19.1 |
| 7⁄8 | 22.2 |
| 1 | 25.4 |
| 11⁄4 | 31.8 |
| 11⁄2 | 38.1 |
| 13⁄4 | 44.5 |
| 2 | 50.8 |
| 21⁄2 | 63.5 |
| 23⁄4 | 69.9 |
| 3 | 76.2 |
| 31⁄2 | 88.9 |
| 4 | 101.6 |
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| Inches | Millimeters (mm) |
|---|---|
| 1⁄8 | 3.2 |
| 1⁄4 | 6.4 |
| 3⁄8 | 9.5 |
| 1⁄2 | 12.7 |
| 5⁄8 | 15.9 |
| 3⁄4 | 19.1 |
| 7⁄8 | 22.2 |
| 1 | 25.4 |
| 11⁄4 | 31.8 |
| 11⁄2 | 38.1 |
| 13⁄4 | 44.5 |
| 2 | 50.8 |
| 21⁄2 | 63.5 |
| 23⁄4 | 69.9 |
| 3 | 76.2 |
| 31⁄2 | 88.9 |
| 4 | 101.6 |