| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| PIRELLI | 4B81 | Direct Cross Interchange | 20 |
| GOODYEAR | 4B81 | Direct Cross Interchange | 20 |
| OPTIBELT | 4B81 | Direct Cross Interchange | 20 |
| PIX Belts | B81/04 | Direct Cross Interchange | 20 |
| THERMOID | 4B81 | Direct Cross Interchange | 20 |
| GOODRICH | 4B81 | Direct Cross Interchange | 20 |
| UNIROYAL | 4B81 | Direct Cross Interchange | 20 |
| Durkee-Atwood | 4B81 | Direct Cross Interchange | 20 |
| Industry Standard | 4B81 | Direct Cross Interchange | 20 |
| Metric Standard | 16C2130J4 | Direct Cross Interchange | 20 |
| WHITE MOTOR | 311669790 | Direct Cross Interchange | 20 |
| DODGE | 4XB81 | Direct Cross Interchange | 20 |
| DODGE | 107428 | Direct Cross Interchange | 20 |
| NSN | 3030010815130 | Direct Cross Interchange | 20 |
| DAYCO | RBP814 | Direct Cross Interchange | 20 |
| DAYCO | 4RBP81 | Direct Cross Interchange | 20 |
| GATES | 4B81 | Direct Cross Interchange | 20 |
| BANDO | 4B81 | Direct Cross Interchange | 20 |