The invention relates to a bone transplant made of a cortical bone material having a screw shaft (1) which has an external thread, and a screw head (2) for the introduction of a tightening torque, in which, according to the invention, the screw head (2) has an outer circumferential surface that is rotationally symmetrical about a screw head axis (S) and which has an external thread, and at least two recesses (3) arranged distributed about the screw head axis (S), extending axially in the direction of the screw head axis (S) and opening in the end face of the free end of the screw head (2) to receive a tightening tool, wherein the recesses (3) are each formed by side faces (4) extending from the outer circumferential surface in the direction of the screw head axis (S), which merge into one another in a surface section close to the axis. Due of the novel design of the screw head (2), the introduction of the tightening torque is optimised and new areas of surgical use, such as in intramedullary splinting, arthroscopic use and deep contersinking of the transplant in the fixing bone are made possible.
