| FAG NUP2304E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| KOYO NUP 2304 R Bearing | 20 | 52 | 21 | KOYO | Cylindrical Roller Bearings |
| NSK NJ 2304 Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| NTN NUP 2304 Bearing | 20 | 52 | 21 | NTN | Cylindrical Roller Bearings |
| SKF 2304M Bearing | 20 | 52 | 21 | SKF | Self-aligning Ball Bearings |
| FAG 2304.2RS.TV Bearing | 20 | 52 | 21 | FAG | Self-aligning Ball Bearings |
| FAG NU 2304 E Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| RHP NU2304 Bearing | 20 | 52 | 21 | RHP | Cylindrical Roller Bearings |
| NSK 2304 K Bearing | 20 | 52 | 21 | NSK | Self-aligning Ball Bearings |
| NTN NJ2304E+HJ2304E Bearing | 20 | 52 | 21 | NTN | Cylindrical Roller Bearings |