| Width | B | 15 | mm |
| Bore diameter | d | 20 | mm |
| Limiting speed | nG | 16,800 | |
| Basic static load rating, radial | C0r | 7,900 |
| Outside diameter | D | 52 | mm |
| Reference speed | nϑr | 14,400 | |
| Fatigue load limit, radial | Cur | 540 | N |
| Basic dynamic load rating, radial | Cr | 16,900 |
| Shoulder diameter inner ring | d1 | 30.30 | mm |
| Minimum chamfer dimension | rmin | 1.10 | mm |
| Caliber diameter outer ring | D2 | 44.40 | mm |
| Maximum fillet radius | ra max | 1.10 | mm |
| Minimum diameter shaft shoulder | da min | 27 | mm |
| Maximum diameter of housing shoulder | Da max | 45 | mm |
| Manufacturer | Part Number |
|---|---|
| Marlin-Rockwell Corp. | 304-SFF |
| GMN | 6304-2Z |
| Torrington | T77304 |
| Mazda | 9-606-2304 |
| SKF | 6304-2Z (SKF) |
| SKF | 6304-2Z/QE6 |
| GPZ Bearings | 80304 |
| Federal Bearings | 1304FF |
| Fafnir | 304KDD |
| Norma-Hoffmann Bearings | 304PP |
| Bearings Company of America | 304SS |
| RIV Officine di Villar Perosa | 5BPPL20 |
| RHP | 6304-2Z |
| Steyr-Daimler-Puch | 6304-2Z |
| Neuweg Fertigung GmbH | 6304.2Z |
| MGM Bearings | 6304-2Z |
| Fischer Bearings | 6304PP |
| FLT | 6304ZZ |
| Koyo | 6304ZZ |
| NSK | 6304 ZZ (NSK) |
| Hoover | 77304 |
| Hyatt | 77604 |
| GPZ Bearings | 80304E |
| UBCO | M020PP |
| SKF | 6304-2ZJ |
| SNR | 6304ZZ |
| SKC | 5950258 |
| Volvo | 181350 |
| Mazda | 9960-62-304 |
