| Factory | Number | Cross Interchange Type | Relevance |
|---|---|---|---|
| ROLLWAY | U1921 | Direct Cross Interchange | 11 |
| CATERPILLAR | 1M5513 | Direct Cross Interchange | 9 |
| BOWER | MU1921V | Direct Cross Interchange | 9 |
| BOWER | MU1921L | Direct Cross Interchange | 9 |
| LINK BELT | MU1921X | Direct Cross Interchange | 9 |
| NDH | BU1921 | Direct Cross Interchange | 9 |
| NSN | 3110009485796 | Direct Cross Interchange | 9 |
| Precision Seals & Bearings | MU1921V | Direct Cross Interchange | 4 |
| DT Components | MU1921V | Direct Cross Interchange | 4 |
| TIMKEN | MU1921V | Direct Cross Interchange | 4 |
| FEDERAL MOGUL | MU1921V | Indirect Cross Interchange | 3 |