| NTN 6304 N Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| FAG 1204 K+H 204 Bearing | 20 | 52 | 15 | FAG | Self-aligning Ball Bearings |
| NACHI NUP304 Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |
| NSK 6304 Bearing | 20 | 52 | 15 | NSK | Deep Groove Ball Bearings |
| NTN NJ 2305 +HJ 2306 Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| NTN NUP 304 E Bearing | 20 | 52 | 15 | NTN | Cylindrical Roller Bearings |
| NACHI NUP 304 E Bearing | 20 | 52 | 15 | NACHI | Cylindrical Roller Bearings |
| NTN 6304-2RZ Bearing | 20 | 52 | 15 | NTN | Deep Groove Ball Bearings |
| KOYO NJ 304 +HJ 304 Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| KOYO 6304Z Bearing | 20 | 52 | 15 | KOYO | Deep Groove Ball Bearings |