Originally Posted by
dabac
Some forks have a groove cut across the threads, and then a washer with an internal tab. The washer goes between cup and locknut, the tab keeps the washer from rotating, which isolates the the cup from the locknut movement, making it possible to torque the locknut with only one tool.
Yes, this is what I have. I was under the impression that it was normal to have the toothed washer, but then again I'm a beginner at this.
Many thanks for all the help (to everyone).