>> C << Hose Clamp Installation
WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.
Connect the fuel filler hose, and tighten the bolt of hose clamp so that the bolt tightening dimension of the hose clump becomes 8.5 ± 1.5 mm (0.33 ± 0.06 inch).
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.