| NTN NUP2304 Bearing | 20 | 52 | 21 | NTN | Cylindrical Roller Bearings |
| KOYO NJ2304R+HJ2304R Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |
| FAG NU 2304 E.TVP2 Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| SKF 62304-2RS1 Bearing | 20 | 52 | 21 | SKF | Deep Groove Ball Bearings |
| RIV N 2304 Bearing | 20 | 52 | 21 | RIV | Cylindrical Roller Bearings |
| SKF NUP 2304 ECP Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| NSK 2304 K Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings |
| FAG NU 2304 E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| KOYO 2304K Bearing | 20 | 52 | 21 | KOYO | Self-aligning Ball Bearings |