Quote Originally Posted by gotm4 View Post
Anyone who's been around aircraft (mainly helicopters) will remember torque on fasteners and secondary methods ensure that fasteners don't come lose.
Very true. Every fastener has a torque.

And self-locking nuts, cotter pins or safety wire to name a few, all act as back-ups to prevent loosening of hardware under the vibration of flight. Much the same way staking in addition to torque, keeps carrier key screws from backing out under the vibration of firing.