Lab Rax Modified 5U Bolted Post

This is a remix of mklements Lab Rax 10" server rack - bolted version. Whenever I installed new equipment into the rack, I got annoyed of the M6 bolts always getting pushed all the way through and falling to the bottom. So I designed this version of the vertical post to better hold onto the nuts while tightening down the screws. Print needs no supports, I recommend 15% infill.