This clamp if fully printable, using printed pegs instead of metallic screws. I also made other changes to make assembly easier.
Build Parameters
Filament - PLA
Layer Thickness - 0.3 mm
Perimeters - 2
Infill - 40%
The author remixed this model.
Note: Blender File used for design loaded per request on 5/2/24
Biggest change was modifying the spring to make it more flexible by changing the cross-section and effectively splitting into two springs. Also adjusted the spacing of the moving parts so each is centered on it respective spring.