Square Cage Nut

I was in need of cage nuts for mounting some hardware into my server rack. I didn't want to wait on shipping...

These use regular M6 bolts with M6 hex nuts. I purposely left the nut cavities loose in case I had issues; gluing them in is an option. The square fits in run of the mill square rack post holes (9.5mm) snuggly.

I did put a small chamfer on the square to provide just a minimal amount of strength. I'm not too sure it helps, or is needed.