| Diagram | Fig. 12 — SWINGING ARM, CENTRE STAND, REAR BRAKE CONTROL · ref 22 |
| Subsystem | suspension rear |
| Listed in parts books | 1969 |
BSA Lockwasher, swinging arm security bolt
Tab lockwasher for the swinging arm security bolt, keeping that bolt from loosening at the pivot.
This is the lockwasher that sits under the swinging arm security bolt, called out in the catalog under the SWINGING ARM, CENTRE STAND, REAR BRAKE CONTROL figure. It's a small tab washer whose job is to keep that security bolt from working loose once it's torqued down, since the swinging arm pivot is not a place you want fasteners walking on their own.
Read more
Our catalog record for this one only shows a single appearance, tied to the 1969 model year, so we can't speak to how far it carries beyond that. If you're restoring a swinging arm assembly and need to confirm this washer matches your bike, give us a call and we'll sort out fitment before you order.
Other catalogs list this same part as a tab washer for the swinging arm security bolt, which lines up with what's in our own records.
Sorry if we got something wrong here. If you think this information isn't correct, .