Our 3D CAD supplier models have been moved to 3Dfindit.com, the new visual search engine for 3D CAD, CAE & BIM models.
You can log in there with your existing account of this site.
The content remains free of charge.
DWG/DXF files do not have any unit, like mm or inch.
But files ordered from PARTcommunity are scaled, so that the unit of the file matches the unit of the ordered part.
That means, that a line with the length 10 can be 10 mm or 10 inch, depending on the selected part.
To check the unit of your selected part, please refer to the structure of the catalogue.