| FAG NJ2304E.TVP2+HJ2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| RHP 2304 Bearing | 20 | 52 | 21 | RHP | Self-aligning Ball Bearings |
| FAG NJ2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| NTN NUP2304 Bearing | 20 | 52 | 21 | NTN | Cylindrical Roller Bearings |
| SKF NU 2304 E CP* Bearing | 20 | 52 | 21 | SKF | Cylindrical Roller Bearings |
| NSK NUP 2304 E Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| SKF 4304 A TN9 Bearing | 20 | 52 | 21 | SKF | Deep Groove Ball Bearings |
| SKF 2304E-2RS1TN9 Bearing | 20 | 52 | 21 | SKF | Self-aligning Ball Bearings |
| NTN NUP 2304 E Bearing | 20 | 52 | 21 | NTN | Cylindrical Roller Bearings |