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 , - the grid structure comprising at least one recess , - the recess comprising a recess contour , - the recess contour 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 . - 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 , - the grid structure comprising at least one recess , - the recess comprising a recess contour , - the recess contour 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 . <EOS>