A sample from the products for the Front Master Cylinder (sv1000sk3/sk4/sk5) include: Bolt, Diaphragm, Boot, Clamp,reservoir Tank Fr.
On this parts fiche the Bolt(6x22) is the most specified component.
The most reasonably priced component used on the Sv1000s 2003 (k3) Usa (e03) Front Master Cylinder (sv1000sk3/sk4/sk5) is the Screw.