Disclosed are bone screw assemblies and kits including the same. Also disclosed are methods for anchoring of bone parts using a bone screw, for example, in order to fix parts of a broken bone in a desired relative orientation. Embodiments of the bone screw assemblies include a screw with an enlarged screw head and a cap having an internal cavity in which the screw head is retained wherein the internal cavity and screw head are dimensioned to allow, during use, a limited movement of the screw head within the cavity including translation of the screw head in a direction parallel to the X-axis of the cap.
