Ford Super Duty Owner's Manual page 382

On vehicles equipped with dual rear wheels, retighten the wheel lug nuts
to the specified torque at 100 miles (160 kilometers), and again at
500 miles (800 kilometers) of new vehicle operation and after any wheel
disturbance (such as tire rotation, changing a flat tire, wheel removal).
Bolt size
M14 x 1.5
* Torque specifications are for nut and bolt threads free of dirt and
rust. Use only Ford recommended replacement fasteners.
It is important to follow the proper wheel mounting and lug nut torque
procedures.
On all two-piece flat wheel nuts, apply one drop of motor oil
between the flat washer and the nut.
2013 F-250/350/450/550 (f23)
Owners Guide gf, 1st Printing
USA (fus)
Wheels and Tires
Wheel lug nut torque*
ft-lb
165
Inspect the wheel pilot hole and
mounting surface prior to
installation. Remove any visible
corrosion or loose particles.
381
N•m
224