All you really need to do is tighten them by hand. And by hand I mean lightly with your fingers. Once you torque the nut to spec, it puts a clamp load on the head and puts a certain amount of tensile stress on the stud, which stretches the stud slightly (elastic deformation). In this state, the stud is "pulling" up against the threads, locking it in place. Make sure that you run a tap in the holes to make sure they are clean in order to attain proper thread engagement.
Also, USE THE THREAD LUBE THEY GIVE YOU or at least oil the threads. Some people think torque is torque and that is your indication that the fastener is serving its purpose. Torque is a measure of force required to overcome the friction between the threads. I have run some tests in the past on a Skidmore Wilhelm (which measures clamp load), where I took two bolts, one with thread lube and one dry, and torqued them down to the same value, and the bolt with the thread lube had a much higher clamping force than the dry one.
Ok
has been given
