OH! Ok I misunderstood. Thats what i call the bearing retaining or adjusting nut. I run it in while turning the hub to seat the bearing, loosen it, then snug it up again then back it off 45 degrees, peen the washer over at least two flats of the first nut then install the second/last nut and torque to 40 foot pounds.
Good luck in your quest

WHOA After I wrote this I went and checked the book! Rear axle lock nut torques to 100-150 foot pounds My bad, the 40 pounds is for the adjusting nut on my dana 44 front axle.
Sorry for passing on mis-information.