| SKF 4304ATN9 Bearing | 20 | 52 | 21 | SKF | Deep Groove Ball Bearings |
| FAG NUP 2304 E.TVP2 Bearing | 20 | 52 | 21 | FAG | Cylindrical Roller Bearings |
| STEYR 2304 K Bearing | 20 | 52 | 21 | STEYR | Self-aligning Ball Bearings |
| SKF NJ 2304 E CP* Bearing | 20 | 52 | 21 | SKF | 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 |
| NSK NU 2304 Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| RHP NU 2304 Bearing | 20 | 52 | 21 | RHP | Cylindrical Roller Bearings |
| NSK NJ2304E+HJ2304E Bearing | 20 | 52 | 21 | NSK | Cylindrical Roller Bearings |
| NACHI NU 2304 E Bearing | 20 | 52 | 21 | NACHI | Cylindrical Roller Bearings |