| NACHI NJ304E Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |
| FAG NU304E.TVP2 Bearing | 20 | 52 | 15 | FAG | Cylindrical Roller Bearings |
| NACHI NU 304 E Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |
| SKF 6304-RSH Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| NSK NJ304 Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings |
| SKF NJ 304 E CP* Bearing | 20 | 52 | 15 | SKF | Cylindrical Roller Bearings |
| NACHI 6304-2RS Bearing | 20 | 52 | 15 | NACHI | Deep Groove Ball Bearings |
| TORRINGTON 7304 C Bearing | 20 | 52 | 15 | TORRINGTON | Angular Contact Ball Bearings |
| RHP 6304-2RS Bearing | 20 | 52 | 15 | RHP | Deep Groove Ball Bearings |
| NSK 6304-2Z Bearing | 20 | 52 | 15 | NSK | Deep Groove Ball Bearings |