| Bore diameter | d | 17 | mm |
| sleeve length | B1 | 28 | mm |
| Thread | G | M20x1 |
| Bore diameter bearing | d | 20 | mm |
| Width nut and lock | B2 | 7 | mm |
| Outside diameter nut | d2 | 32 | mm |
| Manufacturer | Part Number |
|---|---|
| KOYO | H304 |
| SKF | H304 (SKF) |
| NSK | H304 (NSK) |
| NSK | H304X (NSK) |
| FLT | H304 |
| SNR | H304 (SNR) |
| Steyr-Daimler-Puch | H304 |
| ZKL-ZVL | H304 |
| RIV Officine di Villar Perosa | TM20 |
| SKC | 5853609 |
| SKC | 3019830 |
