| 12B1 British Standard pilot bore sprocket |

| Attribute | Value |
|---|---|
| Overall Length | 30 |
| Boss Dia | 37m |
| Outside Dia | 62 |
| Pilot Bore Size | 12 |
| Number of Teeth | 9 |
| Pitch | 3/4 |
Disclaimer: Should a manufacturer of a given part not be available then a direct equivalent from an alternative manufacturer will be supplied.