| KOYO 6304-2RS Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |
| NTN 6304 Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| FLT NJ 304 Bearing | 20 | 52 | 15 | FLT | Cylindrical Roller Bearings |
| STEYR 6304 Bearing | 20 | 52 | 15 | STEYR | Deep Groove Ball Bearings |
| RHP 6304 N Bearing | 20 | 52 | 15 | RHP | Deep Groove Ball Bearings |
| FAG NJ304E Bearing | 20 | 52 | 15 | FAG | Cylindrical Roller Bearings |
| STEYR 1204 K+H 204 Bearing | 20 | 52 | 15 | STEYR | Self-aligning Ball Bearings |
| TORRINGTON 6304-RS Bearing | 20 | 52 | 15 | TORRINGTON | Deep Groove Ball Bearings |
| KOYO 6304BI Bearing | 20 | 52 | 15 | KOYO | Angular Contact Ball Bearings |