A contact element, - comprising a contact box, - the contact box extending in a longitudinal direction of the contact element and at least in sections limiting a receptacle, - the contact box including at least a first box section, a second box section, a third box section and a fourth box section, - the second box section and the fourth box section being arranged opposite to each other, - the fourth box section connecting the first box section to the third box section, - the second box section and the fourth box section being arranged in an inclined manner with respect to the first box section, - the first box section and the third box section being arranged opposite each other, - the second box section and the fourth box section being configured in a rigid manner, - the first box section and the third box section being at least in sections configured in a spring-elastic manner, - the first box section and the third box section are designed for providing a clamping force (F s) for pressing the second box section and the fourth box section onto a contact surface of an in the receptacle retractable engagement section of an additional contact element. - characterized in that - the second box section connects the first box section to the third box section, the first box section and/or the third box section comprise a grid structure (69, 145), - the grid structure (69, 145) comprising at least one recess (70, 75), - the recess (70,75) comprising a recess contour (80, 85), - the recess contour (80, 85) being at least in sections diamond-shaped and/or rectangular and/or square and/or polygonal and/or round and/or elliptical and/or circular and/or slotted, - and/or the first box section and/or the third box section comprise a fold (241, 242). - comprising a contact box, - the contact box extending in a longitudinal direction of the contact element and at least in sections limiting a receptacle, - the contact box including at least a first box section, a second box section, a third box section and a fourth box section, - the second box section and the fourth box section being arranged opposite to each other, - the fourth box section connecting the first box section to the third box section, - the second box section and the fourth box section being arranged in an inclined manner with respect to the first box section, - the first box section and the third box section being arranged opposite each other, - the second box section and the fourth box section being configured in a rigid manner, - the first box section and the third box section being at least in sections configured in a spring-elastic manner, - the first box section and the third box section are designed for providing a clamping force (F s) for pressing the second box section and the fourth box section onto a contact surface of an in the receptacle retractable engagement section of an additional contact element. - characterized in that - the second box section connects the first box section to the third box section, the first box section and/or the third box section comprise a grid structure (69, 145), - the grid structure (69, 145) comprising at least one recess (70, 75), - the recess (70,75) comprising a recess contour (80, 85), - the recess contour (80, 85) being at least in sections diamond-shaped and/or rectangular and/or square and/or polygonal and/or round and/or elliptical and/or circular and/or slotted, - and/or the first box section and/or the third box section comprise a fold (241, 242).