If you're paranoid, you can stake anything, all it takes is a sharp punch. No need however, the 200 ft.lbs. seems to hold it well. On Focus there were problems with those (rear this time) not being tightened enough on new cars, and a subsequent recall. My wagon had special little add on locks to prevent backoff, stupid me went to remove rear drum and broke one of them off. A left handed allen bolt drilled into center of axle stub. I changed the axle bearing and loctited plain type axle nut on, been fine for over a year.