On this parts fiche the Screw(6x18) is the most specified component.
Parts such as the Rear Wheel (model K5): Washer, Tire,rr(110/90 19), Sprocket,rr(nt:49), Tire,rr(110/90 19 62m) are included in the Rm250z 2004 (k4) Usa (e03) Rear Wheel (model K5) parts fiche.