| NTN 6304-RZ Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| MRC NU 304 Bearing | 20 | 52 | 15 | MRC | Cylindrical Roller Bearings |
| NTN 1304 Bearing | 20 | 52 | 15 | NTN | Self-aligning Ball Bearings |
| KOYO 6304-Z Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |
| FAG N 304 E Bearing | 20 | 52 | 15 | FAG | Cylindrical Roller Bearings |
| TORRINGTON 6304 Bearing | 20 | 52 | 15 | TORRINGTON | Deep Groove Ball Bearings |
| NACHI 7304 C Bearing | 20 | 52 | 15 | NACHI | Angular Contact Ball Bearings |
| FAG 1204 K+H 204 Bearing | 20 | 52 | 15 | FAG | Self-aligning Ball Bearings |
| NACHI NJ304E Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |