BONE SCREW FOR OSTEOSYNTHESIS DEVICE, ASSEMBLY FORMED BY A SCREW, A CONNECTOR AND A NUT, AND KIT COMPRISING AT LEAST ONE SUCH ASSEMBLY

The invention relates to a bone screw (1) comprising a lower bone anchor part provided with a thread (2), an upper part consisting of a pin (3) with a threaded outer surface for receiving a nut (12), and a seat (10) for receiving a connector (6) which is used to connect the screw (1) to a rod (20) of an osteosynthesis device and is held against the seat (10) by the nut (12), said bone screw being characterised in that said pin (3) is hollow and has an inner space (24) opening up at the upper end (25) thereof, the lower part of said inner space (24) ending with an impression (26) for receiving a screwdriver. The invention also relates to an assembly formed by such a bone screw (1), a connector (5) for connecting the screw (1) to a rod (20) of an osteosynthesis device, and a nut (12; 22) for holding the connector (5) against the seat (10) of the screw (1). The invention further relates to a kit comprising at least one such assembly and a screwdriver for engaging with said impression (26) ending the lower part of the inner space (24) of the pin (3).