| KOYO NJ2304 Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |
| STEYR 2304 Bearing | 20 | 52 | 21 | STEYR | Self-aligning Ball Bearings |
| FAG NJ2304E.TVP2+HJ2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| FAG NUP2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| NSK NJ 2304 E Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| NSK 2304 Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings |
| SKF NJ 2304 ECP Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| KOYO 2304 Bearing | 20 | 52 | 21 | KOYO | Self-aligning Ball Bearings |
| NSK NU2304 Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| KOYO NU2304 Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |