M3 hex bolt press fit thumb screw
thingiverse
Discovering jpearce's Open Source Optics collection (http://www.thingiverse.com/jpearce/collections/open-source-optics), I found the M3 hex thumb screw with an issue: rounded nuts that need to be fitted before the screw is in place. To address this, I designed a press fit version that won't spin. However, the original SketchUp file had issues; updated files are now fixed and printable. Created using SketchUp along with InvoluteGear and ExportSTL plugins, it has clearances of 0.2mm at the outer nut rim and inner hex edges, adjustable in the SketchUp file if needed.
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