FreeHammer nut for 20x20 extrusion.
Thingiverse
23 model
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse
FreeThingiverse