| Fabricante | Referencia |
|---|---|
| KOYO | NJ304 |
| Norma-Hoffmann Bearings | R-320-P |
| Steyr-Daimler-Puch | NJ304E/TGP1 |
| Fiat | 326104 |
| SKF | NJ304-EC P (SKF) |
| Fiat | 28102410 |
| Parilla | 1391 |
| ZF | 0635416035 |
| ZF | 0735410264 |
| GPZ Bearings | 42304 |
| SKC | 8684583 |
| Borgward / Lloyd Motorenwerke | 9121000200 |
| NSK | NJ304 ET (NSK) |
| Volvo | 183994 |
| Steyr-Daimler-Puch | 0009811301 |
| Marlin-Rockwell Corp. | MR304G |
| Volvo | 181101 |
| Bower Roller Bearing | MR1304EL |
| ZKL-ZVL | NJ304 |
| Fiat | NR13018 |
| Getrag Getriebe | 900.0.441.72 |
| MAN | 90.78527.4120 |
| SNR | NJ304 |
| Steyr-Daimler-Puch | NJ304 |
| RHP | NJ304J |
| Rollway Bearing Co. | MUL-304 |
| Fischer Bearings | NJM20 |
| SKC | 5966761 |
| Steyr-Daimler-Puch | 005412400304 |
| SKF | NJ304 (SKF) |
| RIV Officine di Villar Perosa | 5DBVQ20 |
| DAF-Truck | 584729 |
| SNR | NJ304E G15 (SNR) |
| NSK | NJ304 W (NSK) |
| MAN | 06.32609.0024 |
| Fiat | 810241 |
