| NACHI 1304 K Bearing | 20 | 52 | 15 | NACHI | Self-aligning Ball Bearings |
| SNR 6304 N Bearing | 20 | 52 | 15 | SNR | Deep Groove Ball Bearings |
| SKF 6304-ZNR Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| MRC 7304 AC Bearing | 20 | 52 | 15 | MRC | Angular Contact Ball Bearings |
| FLT NJ304 Bearing | 20 | 52 | 15 | FLT | Cylindrical Roller Bearings |
| SKF 6304-RS Bearing | 20 | 52 | 15 | SKF | Deep Groove Ball Bearings |
| KOYO NJ304E+HJ304E Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| KOYO NUP 304 R Bearing | 20 | 52 | 15 | KOYO | Cylindrical Roller Bearings |
| MAC NU 304 Bearing | 20 | 52 | 15 | MAC | Cylindrical Roller Bearings |
| RHP 6304-2Z Bearing | 20 | 52 | 15 | RHP | Deep Groove Ball Bearings |