Quick question when bolting the rear hub carriers on the rear upright, Its already threaded but do people generally still put a washer and nyloc nut on the other side as i've done this and it seems to be very close to the driveshaft? Also any idea on torque?

i used some locktite on the threads and thats all
torque wise i havent a clue just did mine as tight as i could with a useless 3/8th ratchet