| NSK 1304 Bearing | 20 | 52 | 15 | NSK | Self-aligning Ball Bearings |
| NSK NJ 309 +HJ 310 Bearing | 20 | 52 | 15 | NSK | Cylindrical Roller Bearings |
| NACHI 6304N Bearing | 20 | 52 | 15 | NACHI | Deep Groove Ball Bearings |
| MRC NJ 304 Bearing | 20 | 52 | 15 | MRC | Cylindrical Roller Bearings |
| SKF 6304 Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| RHP 6304-2Z Bearing | 20 | 52 | 15 | RHP | Deep Groove Ball Bearings |
| STEYR NU 304 Bearing | 20 | 52 | 15 | STEYR | Cylindrical Roller Bearings |
| MRC QJ304 Bearing | 20 | 52 | 15 | MRC | Angular Contact Ball Bearings |
| FAG 7304B Bearing | 20 | 52 | 15 | FAG | Angular Contact Ball Bearings |
| SKF NUP 304 E CP* Bearing | 20 | 52 | 15 | SKF | Cylindrical Roller Bearings |