| FAG NJ2304E.TVP2+HJ2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| SKF NJ 2304 E CP Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| SKF NJ2304E+HJ2304E Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| NTN 2304 K Bearing | 20 | 52 | 21 | NTN | Self-aligning Ball Bearings |
| NACHI 2304 K Bearing | 20 | 52 | 21 | NACHI | Self-aligning Ball Bearings |
| NSK NSK2304TN Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings |
| NACHI 2304 Bearing | 20 | 52 | 21 | NACHI | Self-aligning Ball Bearings |
| KOYO NU 2304 Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |
| NSK NUP2304E Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| STEYR NJ 2304 E Bearing | 20 | 52 | 21 | STEYR | Cylindrical Roller Bearings |