| SKF *6304-2RSH Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| NTN NUP304 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| KOYO 1304 K Bearing | 20 | 52 | 15 | KOYO | Self-aligning Ball Bearings |
| NSK N304 Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings |
| SKF 7304 BEC BPH* Bearing | 20 | 52 | 15 | SKF | Angular Contact Ball Bearings |
| FAG NU304E Bearing | 20 | 52 | 15 | FAG | Cylindrical Roller Bearings |
| FAG 6304-Z Bearing | 20 | 52 | 15 | FAG | Deep Groove Ball Bearings |
| NTN NJ304+HJ304 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| MRC NJ304 Bearing | 20 | 52 | 15 | MRC | Cylindrical Roller Bearings |
| FAG 6304-ZN Bearing | 20 | 52 | 15 | FAG | Deep Groove Ball Bearings |