Parts such as the Seat (vl1500k5/k6/k7/k8/k9): Nut, Bracket,rr, Bolt(6x18), Washer(6.5x20x1.6) are included in the Vl1500 Boulevard C90 2007 (k7) Usa (e03) Seat (vl1500k5/k6/k7/k8/k9) parts fiche.
The Seat (vl1500k5/k6/k7/k8/k9) assembly is constructed from several parts from which the Seat Assy is the most expensive.
In this schematic the "Cushion" is used most often.