| NTN 1304 Bearing | 20 | 52 | 15 | NTN | Self-aligning Ball Bearings |
| ZKL 7304 B Bearing | 20 | 52 | 15 | ZKL | Angular Contact Ball Bearings |
| STEYR 6304-2RS Bearing | 20 | 52 | 15 | STEYR | Deep Groove Ball Bearings |
| NACHI 6304 N Bearing | 20 | 52 | 15 | NACHI | Deep Groove Ball Bearings |
| SKF W6304 Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| KOYO 6304 Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |
| RHP 1304 Bearing | 20 | 52 | 15 | RHP | Self-aligning Ball Bearings |
| MRC 6304-Z Bearing | 20 | 52 | 15 | MRC | Deep Groove Ball Bearings |
| NACHI 6304-ZN Bearing | 20 | 52 | 15 | NACHI | Deep Groove Ball Bearings |
| NTN NJ304E Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |