Spaceeater's spool holder nut remix

Because some of my spool needs a different nut, I drawn this one.

I didn't remember where I took the original one but Spaceeater's spool holder have the same dimensions...
Except I didn't have the same nut. Anyway, it fits with mine (I measured on stl files), so I considered it as source:
I've reused the screw pitch by extracting it in Blender (boolean operations) and merge it with the freeCAD drawing.