I recently made this set of bumper brackets (well they're about 90% done):
http://www.twisted-halo.com/digicam/...er%20mount.pdf

And I was wondering if anyone has a list of what hardware I'll need in order to connect them. The diagram didn't come with any.

some grade 8 bolts.

How many, what size?

how ever many holes that are in the brackets that match up where your attaching it.

What size? Do I need any nuts for the bolts? Etc, etc, etc. I need moar info!

dude if you are going to be fabricating your own stuff do a little googlin. Look up grade 8 hardware and you should find charts that tell you the strengths of each size. Find something beefy that will suit your application, throw some nuts and lock washers on it and be done with it.

i dont know of an exact size, but obviously something that will fit in what you have. something comparable to leaf spring or lca bolts might work. just look online or go to your local hardware store and poke around.