Reservoir assy bolt. A Bolt which secures the fender Apron to it's mounting point. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Frame Side Member to it's mounting point. Washer Fluid Reservoir Bolt. panel. StepPED. Fender. Frame Side Member. SideMember Assembly. Washer Fluid Reservoir. Included with: Apron panel, Apron/rail Assembly.