| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| ABMA | 105BC19 | Direct Cross Interchange | 12 |
| MRC | 1921S | Direct Cross Interchange | 12 |
| SKF | 6921 | Direct Cross Interchange | 12 |
| SKF | 61921 | Direct Cross Interchange | 12 |
| NTN | 6921 | Direct Cross Interchange | 12 |
| NACHI | 6921 | Direct Cross Interchange | 12 |
| KOYO | 6921 | Direct Cross Interchange | 12 |
| FAG | 61921 | Direct Cross Interchange | 12 |
| FEDERAL | 1921 | Direct Cross Interchange | 12 |
| SCHEERER | 61921M | Direct Cross Interchange | 12 |