Go Hookless: Clip the tips from No. 6 hollow wall anchors, drive them into pegboard, then secure your tool holder by driving screws into the anchors. Short lag bolts fit snugly in the holes to create additional hangers for lightweight objects.
Moving Tip - Packing Tape As Nut and Bolt Holder: Gather loose bolts and nails for furniture, etc. by sticking them to a length of packing tape and layering another piece on top; label what they go with.