Parts such as the Rear Combination Lamp: Bulb(12v7.5w), Spacer (6.4x9x10.5), Lens, Gasket (nas) are included in the Vs1400glp Intruder 2003(k3) Usa (e03) Rear Combination Lamp parts fiche.
On this parts fiche the Washer(6.5x20x1.2) is the most specified component.