Take a look at the picture below.  I am trying to simulate the contact force in the socket drive (black) and nut in this assembly.  Currently, I have a fixed geometry setting on the inner surface of the nut (simulating locked threads) and roller/slider on the bottom faces of both the nut and socket drive.  I defined a global contact setting of no penetration.  I then applied a specific torque to the socket drive to see what happened.  It isn't showing correct results and appears faulty.  Does anybody have some insight on how to perform this simulation?  I tried searching but didn't really know what I should be searching for.