35 ft/lbs, NO threadlocker of any kind, stake one or two notches with a punch and ~8oz hammer.
Use more lighter strikes rather than a few heavy ones as hitting the punch too hard will deform the end plate making it difficult to remove from the receiver extension if you ever take it apart.
To remove a staked castle nut, use a vice block that holds the receiver extension and use a dead blow mallet to hit the wrench to shear off the staking.
Re-torque slightly past the original staking or use a new end plate.
I like LMT castle nuts as the have a small round indention for the staking that is easier to fill with a hammer and round punch vs the more common square slots in other castle nuts.

