The front rotor's on the wife's Highlander need replacing. Noticed it a while back and since it was time to rotate the tires, I figured I would swap the rotors real fast since I was there. So, went through the process of lifting the vehicle and swapping tires to realize there is a nail in one tire. So into the 4Runner fro the plug kit to fix that issue real fast and then go back the the original plan. Put the tires back on the rear and torque, then move to the front and removed the caliper on one side and at this point I realize you need to remove the axle nut to get the rotor off. In addition, this looks to be a specialty nut, not your standard hex. Back into the back of the 4Runner and rummage around the tool bag, and nothing for this axle nut. I have the 35 mm for the 4Runner, a 27 mm, 22 mm, 21mm and so on down the list.

So my question is, does anyone know the exact Size and Type for the axle nut?

Your help will be greatly appreciated.