Car Carpet Screw

This is a 3d model to print a screw to hold the carpets in the car. I've copied the design from the original one and added a some millimeters in the screw length.
I've split the design in 2 to enhance the printing. After the print you have to glue the 2 pieces together.
I've printed the object with with 50% infill.
As prescribed from GPL license, I include the "source" freeCAD file and a copy of the license.