Regarding to DANA trial production the prop shaft with center bearing of FE model and report to us as mail below. We went to check at DANA and found when they apply torque min spec. 290 N-m. The Nut slot and shaft hole as picture below.
After they turn until slot and hole is alignment. Torque is over to 550 N-m. as the attached report which they found 3 shafts from 12 shafts.