Bone graft comprising cortical bone material having a screw shank with an external thread and a screw head. Screw head has an outer jacket surface which is rotationally symmetrical about a screw head axis and has an external thread. At least two recesses, which are distributed about the screw head axis, extend axially in the direction of the screw head axis and open into an end face of a free end of the screw head, for receiving an insertion tool. The recesses are each formed by side faces, which extend from the outer jacket surface in the direction of the screw head axis and merge into one another in a surface section close to the axis. By this design, introduction of an insertion torque is optimized and new surgical areas of application such as in intramedullary splinting, arthroscopic insertion and deep insertion of the graft into an bearing bone are possible.