The present invention relates to a contacting unit (t) for electrical conductors or pin contacts (8). Contacting units (1) of this kind are used for reversibly contacting said conductors or pin contacts (8) in an electrical and mechanical manner. In the present invention, the spring force that acts on a conductor or pin contact (8) to be connected can be variably adjusted. To this end, the free, spring-loaded length of a spring contact member (11) is varied by means of a sliding element (20). As a result of the variation of the spring-loaded length of the spring contact member (11), the spring force is increased in the case of a shortening and is correspondingly reduced in the case of an extension.