On this parts fiche the Bolt(6x25) is the most specified component.
The ten Gsxr750x 2005 (k5) Usa (e03) Radiator component parts are all listed in this schematic.
Parts such as the Radiator: Spacer(6.5x10x12), Bolt(6x25), Cap,radiator(1.1), Fan Assy,radiator are included in the Gsxr750x 2005 (k5) Usa (e03) Radiator parts fiche.