| TORRINGTON 6304-Z Bearing | 20 | 52 | 15 | TORRINGTON | Deep Groove Ball Bearings |
| KOYO NJ 304 +HJ 304 Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| STEYR 6304-ZN Bearing | 20 | 52 | 15 | STEYR | Deep Groove Ball Bearings |
| STEYR 6304-2Z Bearing | 20 | 52 | 15 | STEYR | Deep Groove Ball Bearings |
| KOYO NJ304E+HJ304E Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| KOYO 1304 Bearing | 20 | 52 | 15 | KOYO | Self-aligning Ball Bearings |
| KOYO 6304-2Z Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |
| NTN 6304-Z Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| NACHI 6304-Z Bearing | 20 | 52 | 15 | NACHI | Deep Groove Ball Bearings |
| KOYO 6304 Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |