| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| Precision Seals & Bearings | DRK321MK | Direct Cross Interchange | 8 |
| TIMKEN | DRK321MK | Direct Cross Interchange | 4 |
| FEDERAL MOGUL | RA321MK | Direct Cross Interchange | 4 |
| DT Components | DRK321RMK | Direct Cross Interchange | 3 |
| CHICAGO RAWHIDE | DK321MK | Direct Cross Interchange | 3 |
| SKF | DK321MK | Direct Cross Interchange | 3 |
| TIMKEN | DRK321RMK | Direct Cross Interchange | 3 |
| SKF | SDK321MK | Indirect Cross Interchange | 1 |