| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| Precision Seals & Bearings | R508 | Direct Cross Interchange | 1 |
| DT Components | R508 | Direct Cross Interchange | 1 |
| FEDERAL | 508RING | Indirect Cross Interchange | 2 |
| McQuay-Norris | BB508R | Indirect Cross Interchange | 2 |
| ABC | R508 | Indirect Cross Interchange | 2 |
| L&S Bearing | R508 | Indirect Cross Interchange | 2 |
| FEDERAL MOGUL | R508 | Indirect Cross Interchange | 2 |
| SKF | R508 | Indirect Cross Interchange | 2 |