[nickpinkston]

We're actually in process of building this for individual components (bolts, motors, gears, etc.) at: https://beta.govolition.com where you can search for components, filter by spec, download CAD/specs, and purchase the parts.

But also check out:

- https://grabcad.com/library/tag/library <-- Lots of multi-part projects in addition to components.

- http://traceparts.com/ <-- Individual component CAD

- https://www.3dcontentcentral.com/ <-- Individual component CAD

Generally, you'll want to download .STEP files so they import into FreeCAD, as opposed to native Solidworks Part files, etc.