The thread inside the static part of my cloth rail locking mechanism got stripped from being screwed too hard, so it didn't lock properly, and couldn't be screwed further.

This 3D model replaces the static part of the locking mechanism, to be used in conjunction with an M6 thumbscrew like this one.

Only necessary hardware is an M6 square nut.

OpenSCAD source is provided if you want to make changes to the dimensions for your own use.

Fillets library under a BSD 2-clause license from https://github.com/ademuri/openscad-fillets

Rounded cube from https://gist.github.com/groovenectar/92174cb1c98c1089347e