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:
- Hex_nut_M8_higher.stl : An M8 hex nut 13mm in height
- Hex_nut_M8_wider.slt : An M8 hex nut with an outer diameter of 20mm
- washer_M8_extra.slt: A M8 washer with an outer diameter of 20mm