Watertight fastening devices employed in a solar panel installation system

A solar panel installation system, comprising:

• a track with at least one conically-shaped aperture;
• a base plate, comprising:
• at least one conically-shaped protrusion protrusion extending upwardly away from an upper surface of the base plate, and
• at least one base plate aperture, where:
• each base plate aperture has upper and lower ends and situated concentrically with respect to one conically-shaped protrusion, and
• a width of the upper end of each base plate aperture is smaller than a width of the lower end of the base plate aperture;
• and
• at least one fastening device with an integral head, shank, and cover, where;
• the shank extends away from the head towards a distal end of the shank, and
• the cover extends outwardly and away from the head in the direction of the shank and defines an annular hollow region between the shank and an inner surface of the cover, where;
• the track is disposed on top of the base plate with each conically-shaped protrusion of the at least one conically-shaped protrusion extending upwardly through one conically-shaped aperture of the at least one conically-shaped aperture, and
• the distal end of the shank is inserted downwardly through one conically-shaped track aperture and one base plate aperture, such that:
• the hollow region of the cover is configured to envelop one conically-shaped protrusion and the conically-shaped track aperture when a tightening force is applied to the fastening device extending through the base plate aperture until the cover is secured to the track, the track is secured to the base plate, and the base plate is secured to an installation surface, and
• the conically-shaped protrusion of the base plate extends beyond the conically-shaped track aperture into the hollow region of the cover when the tightening force is applied to the fastening device.