Tensioning element for a holder device of a hinge and hinge for a front bonnet with such a tensioning element

The clamping element has two clamping parts that are corresponded to each other, where the clamping length of the clamping element is reduced by a relative movement of the clamping parts to each other. The clamping length is reduced by a relative rotation of the clamping parts. An independent claim is also included for a hinge with an actuating unit.