| FAG 2304TV Bearing | 20 | 52 | 21 | FAG | Self-aligning Ball Bearings |
| NSK 2304K Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings |
| SKF NUP 2304 E CP* Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| STEYR NJ 2304 Bearing | 20 | 52 | 21 | STEYR | Cylindrical Roller Bearings |
| FAG NUP2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| SKF NUP2304E Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| KOYO 2304 Bearing | 20 | 52 | 21 | KOYO | Self-aligning Ball Bearings |
| FAG 32304 A+T2F D020 Bearing | 20 | 52 | 21 | FAG | Tapered Roller Bearings |
| SKF 4304 A TN9 Bearing | 20 | 52 | 21 | SKF | Deep Groove Ball Bearings |