[JesseK]

I don't use the fastener wizard (or the hole wizard for that matter). I CAD the bolts myself, then add nuts. It's actually pretty easy to make the bolts as parts, and for the nuts I create hollow cylinders that represent the maximum nut dimensions. (edit -- note that creating your bolts will allow you define the lengths of your bolts, rather than allowing the lengths of the bolts available to define your assembly)

In order to assemble the sprocket, bolts, nuts, and wheel, you will want to define two main types of mates: concentric holes and coplanar faces. The best tip here is to define the mates exactly as you would assemble it physically. This will ensure everything lines up and there are no misrepresentations. If you need the sprocket raised away from the wheel, you can create spacers as parts and insert them in between the wheel and sprocket. Be sure to use descriptive file names when saving parts to make it easier if you want to create a new assembly later.

It seems like alot of part creation, but in the end you will know every part, every assembly method, and perhaps a realistic final weight for the assembly if you go that far.