| Manufacturer | Designation | nickname |
|---|---|---|
| Curtiss | CT | |
| Douglas | DT | |
| Fokker | FT | |
| Martin | MBT | |
| Martin | MT | |
| Stout | ST | |
| Douglas | T2D | |
| Naval Aircraft Factory | T2N | |
| Douglas | T3D | |
| Martin | T3M | |
| Martin | T4M | |
| Martin | T5M | |
| Martin | T6M | |
| Boeing | TB | |
| Great Lakes | TG | |
| Martin | TM | |
| Naval Aircraft Factory | TN | |