For mounting a front fender on a bike with a recessed brake bolt/nut: Rather than using Sheldon Nuts, or mounting the bracket to the front of the fork (which can cause the braces to interfere with the fork sometimes), I enlarged the hole in mounting tab to slide over the recessed nut, and put the tab inside the fork crown. To keep the tab towards the back of the crown, I also put a short section of rubber hose in front of it. Happy with the results so far.