Fully working printable M8 hex nuts with standard dimensions. They are derived from the wonderful ISO Metric thread library by Trevor Moseley.
Do you want to build a Prusa with printable nuts and washers? Just download them and do it!
You can see these parts in action in this video:
More information (In Spanish):
The printable nuts are not only functional and cool. They can also be taken off very easily from the heatbed using a Wrench!! :-D
The hex nut and washer with standard dimensiones are the files:
Hex_nut_M8.stl and washer_M8.stl.
But these parts are also parametric (designed with OpenScad), so that the user can easily change the height and outer diameters. I have created some STLs as an example: