| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| DT Components | DRK321MK | Direct Cross Interchange | 4 |
| TIMKEN | DRK321MK | Direct Cross Interchange | 3 |
| Precision Seals & Bearings | DRK321MK | Direct Cross Interchange | 3 |
| DT Components | DRK321RMK | Indirect Cross Interchange | 2 |
| CHICAGO RAWHIDE | DK321MK | Indirect Cross Interchange | 2 |
| SKF | DK321MK | Indirect Cross Interchange | 2 |
| TIMKEN | DRK321RMK | Indirect Cross Interchange | 2 |
| SKF | SDK321MK | Indirect Cross Interchange | 1 |