| FAG NJ2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| STEYR NJ 2304 E Bearing | 20 | 52 | 21 | STEYR | Cylindrical Roller Bearings |
| NACHI NJ 2304 +HJ 2304 Bearing | 20 | 52 | 21 | NACHI | Cylindrical Roller Bearings |
| KOYO NJ2304R Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |
| NTN 2304 Bearing | 20 | 52 | 21 | NTN | Self-aligning Ball Bearings |
| FAG NUP 2304 E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| FAG 32304A+T2FD020 Bearing | 20 | 52 | 21 | FAG | Tapered Roller Bearings |
| FAG NU2304E.TVP2 Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| KOYO NJ 2304 Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |