Summary

I needed a little wrench to tighten the M4 nylock nuts on my Mendel, so I designed a parametric wrench.

Instructions

If you need a wrench to tighten M4 nylock nuts download the STL.

Otherwise download the STL and modify the diameter value (flat to flat diameter of hex nut), thickness, overall length, and make any other modifications you want when generating your your own custom wrench.

This OpenSCAD version can also be made as strong (thick) or weak (thin) as desired. Simply modify the thickness and margin variables that I have at the top. There is also a variable for the overall length.

Otherwise download the STL and modify the diameter value to generate your own custom wrench!

Parametric Wrench in OpenSCAD