U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
| Inches | Millimeters (mm) |
|---|---|
|
| 3.2 |
|
| 6.4 |
|
| 9.5 |
|
| 12.7 |
|
| 15.9 |
|
| 19.1 |
|
| 22.2 |
| 1 | 25.4 |
| 1
| 31.8 |
| 1
| 38.1 |
| 1
| 44.5 |
| 2 | 50.8 |
| 2
| 63.5 |
| 2
| 69.9 |
| 3 | 76.2 |
| 3
| 88.9 |
| 4 | 101.6 |
Regulations most recently checked for updates: Aug 28, 2025
| Inches | Millimeters (mm) |
|---|---|
|
| 3.2 |
|
| 6.4 |
|
| 9.5 |
|
| 12.7 |
|
| 15.9 |
|
| 19.1 |
|
| 22.2 |
| 1 | 25.4 |
| 1
| 31.8 |
| 1
| 38.1 |
| 1
| 44.5 |
| 2 | 50.8 |
| 2
| 63.5 |
| 2
| 69.9 |
| 3 | 76.2 |
| 3
| 88.9 |
| 4 | 101.6 |