We demonstrate that non-locality of the model potential plays a dominant role in the determination of the structure factor of alkali metals in the OCP model. Shaw's non local model potential combined with an analytic form of the direct correlation function in the Baus and Hansen scheme is found accurate to determine the structure factor of alkali metals up to the first peak. on leave from Kanpur University India. low-q behaviour they are displayed in last column to compare with bare OCP reference system in Baus and Hansen scheme.