| Bore diameter | d | 20 | mm |
| Width | B | 15 | mm |
| Basic static load rating, radial | C0r | 7,900 | |
| Limiting speed | nG | 8,800 |
| Outside diameter | D | 52 | mm |
| Basic dynamic load rating, radial | Cr | 16,900 | |
| Fatigue load limit, radial | Cur | 540 | N |
| Minimum diameter shaft shoulder | da min | 27 | mm |
| Maximum fillet radius | ra max | 1.10 | mm |
| Maximum diameter of housing shoulder | Da max | 45 | mm |
| Minimum chamfer dimension | rmin | 1.10 | mm |
| Shoulder diameter inner ring | d1 | 30.30 | mm |
| Caliber diameter outer ring | D2 | 44.40 | mm |
| Manufacturer | Part Number |
|---|---|
| Marlin-Rockwell Corp. | 304-SZZ |
| Bearings Company of America | 304CC |
| Bearings Company of America | 304DD |
| Fischer Bearings | DN304 |
| Steyr-Daimler-Puch | 0009813425 |
| Atlas Copco | 0502315900 |
| Talbot | 0051183000 |
| Iveco / Magirus | 01109118 |
| Federal Bearings | 1304RR |
| Volvo | 1518603 |
| GPZ Bearings | 180304E |
| Norma-Hoffmann Bearings | 304KK |
| Fafnir | 304PP |
| SKC | 5950241 |
| SKF | 6304-2RS |
| MGM Bearings | 6304.2RS |
| RHP | 6304-2RS |
| SKF | 6304-2RS1/QE6 |
| FLT | 6304.2RS |
| KOYO | 63042RS |
| KOYO | 6304DD |
| NSK | 6304DD |
| NTN | 6304LL |
| NTN | 6304LLU |
| Hoover | 99304 |
| Hyatt | 99604 |
| RIV Officine di Villar Perosa | BLN20 |
| UBCO | M020SS |
| SKF | 6304-2RS1 (SKF) |
| Neuweg Fertigung GmbH | 6304.2RS |
| Steyr-Daimler-Puch | 6304-2G |
| GMN | 6304-2RS |
| Bearings Company of America | 304FF |
| NSK | 6304-DDU (NSK) |
| NSK | 6304DDU CM (NSK) |
| SNR | 6304-EE (SNR) |
| Iveco / Magirus | 1109118 |
| Iveco / Magirus | 28996660 |
| Volvo | 181876 |
| Steyr-Daimler-Puch | 000625406304 |
| DAF-Truck | 619994 |
| Lancia | 82041045 |
| Peugeot | 4451183000 |
| FORD | 8810094 |
| FORD | 88A10094 |
| Toyota | 90099-10082 |
| ZF | 0635333105 |
| Atlas-Weyhausen | 0502.3159.00 |
| Isuzu | 00090-118 |
