| SKF 7304 BEC BPH* Bearing | 20 | 52 | 15 | SKF | Angular Contact Ball Bearings |
| FAG NJ304E+HJ304E Bearing | 20 | 52 | 15 | FAG | Cylindrical Roller Bearings |
| SKF 6304NR Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| KOYO 1304 K Bearing | 20 | 52 | 15 | KOYO | Self-aligning Ball Bearings |
| NSK 6304N Bearing | 20 | 52 | 15 | NSK | Deep Groove Ball Bearings |
| TORRINGTON 6304-ZN Bearing | 20 | 52 | 15 | TORRINGTON | Deep Groove Ball Bearings |
| NTN 6304-ZN Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| FAG 21304 CC Bearing | 20 | 52 | 15 | FAG | Spherical Roller Bearings |
| FAG 6304-2RS Bearing | 20 | 52 | 15 | FAG | Deep Groove Ball Bearings |
| NACHI NJ 304 +HJ 304 Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |