To replace the pressed-in stud joint fastenings option 1 would have been using identical M10 ATV wheel studs and press those in, but I could not find any stainless ones in that size. So I found the holes in the flanges to be perfect for 7/16" bolts. I also choose an ARP bolt because they claim a high strength rating in stainless. These are 20 tpi a fine thread pitch about a thousanth per thread difference to a 1.25 metric bolt.