| Manufacturer | Part Number |
|---|---|
| ISO | 20RN03 |
| SKC | 3008669 |
| GPZ Bearings | 2304 |
| ABMA | 20RN03 |
| RIV Officine di Villar Perosa | 5DBPV20 |
| Norma-Hoffmann Bearings | R-320 |
| Marlin-Rockwell Corp. | MR304C |
| Bower Roller Bearing | MU1304CL |
| Koyo | N304 |
| RHP | N304 |
| Steyr-Daimler-Puch | N304 |
| ZKL-ZVL | N304 |
| NSK | N304ET |
| NSK | N304 W (NSK) |
| Fischer Bearings | NM20 |
| NTN | N304 |
| SKF | N304 (SKF) |
| SKF | N304-EC P (SKF) |
| SNR | N304E G15 (SNR) |
| RHP | N304J (RHP) |
| Hyatt | BU1304Z |
| Renault | 8022040 |
| Faun | 5049020 |
| SKC | 5966077 |
| Fiat | 2049055 |
| Rover | 5539Z885 |
| ISO | 40128 |
