| RIV NU2304 Bearing | 20 | 52 | 21 | RIV | Cylindrical Roller Bearings |
| SKF 4304 A TN9 Bearing | 20 | 52 | 21 | SKF | Deep Groove Ball Bearings |
| KOYO 2304 Bearing | 20 | 52 | 21 | KOYO | Self-aligning Ball Bearings |
| SYEYR NU 2304 E Bearing | 20 | 52 | 21 | SYEYR | Cylindrical Roller Bearings |
| NACHI NJ2304 Bearing | 20 | 52 | 21 | NACHI | Cylindrical Roller Bearings |
| NSK NUP 2304 E Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| NACHI 2304 Bearing | 20 | 52 | 21 | NACHI | Self-aligning Ball Bearings |
| NSK NSK62304-2RS1 Bearing | 20 | 52 | 21 | NSK | Deep Groove Ball Bearings |
| STEYR 2304 Bearing | 20 | 52 | 21 | STEYR | Self-aligning Ball Bearings |
| STEYR NJ2304 Bearing | 20 | 52 | 21 | STEYR | Cylindrical Roller Bearings |