| Designation | Nickname | Primary role |
|---|---|---|
| 5-AT | Tri-motor | Commercial Transport |
| C-3 | U.S. Air Force Transport (1925-1962) | |
| C-4 | U.S. Air Force Transport (1925-1962) | |
| C-9 | U.S. Air Force Transport (1925-1962) | |
| JR | U.S. Navy / Marines Transport (1926-1931) | |
| RR | Tri-motor | U.S. Navy / Marines Transport (1931-1962) |