Has anyone bought a thru axel that has worked well with the Cs 057. If so what kind?

I have a 256 frame but I think the dropouts are the same as the 57. 

I had trouble with the stock axle coming loose so I switcjed to a Shimano thru axle, AX76, which works great.  Just make sure when you get one that comes with the axle and nut as the threads are different.