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34 FR 13905, Aug. 30, 1969, unless otherwise noted. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981.
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| Inches | Millimeters (mm) |
|---|---|
| 1⁄4 equals | 6.4 |
| 3⁄8 equals | 9.5 |
| 1⁄2 equals | 12.7 |
| 9⁄16 equals | 14.3 |
| 5⁄8 equals | 15.9 |
| 3⁄4 equals | 19.1 |
| 7⁄8 equals | 22.2 |
| 1 equals | 25.4 |
| 11⁄4 equals | 31.8 |
| 11⁄2 equals | 38.1 |
| 3 equals | 76.2 |
| 32⁄16 equals | 79.4 |
| 36⁄16 equals | 85.7 |
| 38⁄16 equals | 88.9 |
| 310⁄16 equals | 92.1 |
| 313⁄16 equals | 96.8 |
| 314⁄16 equals | 98.4 |
| 315⁄16 equals | 100.0 |
| 42⁄16 equals | 104.8 |
| 45⁄16 equals | 109.5 |
| 48⁄16 equals | 114.3 |
| 412⁄16 equals | 120.7 |
| 5 equals | 127.0 |