Multi-part vehicle floor cover with lap joint

In a multi-part vehicle floor cover, a lap joint comprising:

• a first part with a first lateral edge, a first top surface, a first bottom surface, and a first thickness between the first top surface and the first bottom surface;
• a second part having a body, a lateral end of the body adapted to mate with the first lateral edge, a lap panel of the second part extending from the lateral end in a direction opposite the body and having a second lateral edge spaced from the lateral end, the lap panel having a second top surface, a second bottom surface and a second thickness between the second top surface and the second bottom surface;
• and
• a plurality of fastening systems for fastening the first part to the lap panel of the second part, the fastening systems laterally spaced apart from each other and spaced from the lateral end, the first lateral edge and the second lateral edge, each fastening system including
• a first hole formed in the first part to extend from the first top surface to the first bottom surface, a bottom diameter of the first hole taken at the first bottom surface being greater than a top diameter of the first hole taken at the first top surface, the first hole formed on a fastening system axis;
• a second hole formed in the lap panel to extend from the second top surface to the second bottom surface, a bottom diameter of the second hole taken at the second bottom surface being greater than a top diameter of the second hole taken at the second top surface, the second hole disposed on the fastening system axis when the first part is joined to the lap panel;
• and
• a button having a top cap with a lateral periphery, a bottom ring, and a shaft extending between the top cap and the bottom ring, the button disposed on the fastening system axis when the first part is joined to the lap panel, a diameter of the bottom ring being greater than the bottom diameter of the second hole, a diameter of the lateral periphery of the top cap being greater than the top and bottom diameters of the second hole and the first hole, a length of the shaft between the top cap and the bottom ring being greater than the sum of the first thickness and the second thickness.