How to move along 2 axis EQUALLY? All I seem to be able to find when I search is the ability to lock an axis and move on the other 2 freely but I want to move along those 2 axis equally, so if I lock the Y and I move on the X and Z I want it to move the same distance on both the X and Z axis. 

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So as you can likely guess, I want to duplicate the nut and move it on an axis of 45°.
I don't think Blender can do this directly. You could rotate the nut 45 degrees, switch Blender to local coordinates, and then move along one of those axes.