M3 Thumb Nut

An M3 thumb nut that can be used with [Hold Down Clamp V2](https://www.thingiverse.com/thing:2841271) and [T-Nut M4 for 20 extrusion slot 5](https://www.thingiverse.com/thing:2852669)

I created this to use the above items as a clamping solution for standard 2080 extrusions that I am using as the bed for my CNC. The results are quite satisfying !