| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| Precision Seals & Bearings | DRK321C | Direct Cross Interchange | 6 |
| TIMKEN | DRK321C | Direct Cross Interchange | 5 |
| FEDERAL MOGUL | RA321C | Direct Cross Interchange | 4 |
| SKF | DK321C | Direct Cross Interchange | 4 |
| CHICAGO RAWHIDE | DK321C | Direct Cross Interchange | 3 |
| SKF | SDK321C | Indirect Cross Interchange | 1 |