| NACHI 1304K Bearing | 20 | 52 | 15 | NACHI | Self-aligning Ball Bearings |
| NTN NUP 304 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| STEYR 6304-2RS Bearing | 20 | 52 | 15 | STEYR | Deep Groove Ball Bearings |
| KOYO NU 304 R Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| NTN NU 304 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| NTN 6304-2RS Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| NSK NF 304 Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings |
| SKF 6304-ZN Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| NTN NJ 304 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| KOYO NU304E Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |