Abstract: A spring sleeve for an electrical contact element, in particular for a medical implant, including a connector bore for receiving an electrical mating contact in an insertion direction; at least one spring accommodating region, which is disposed around the connector bore, at least in regions, and is open, at least in regions, toward the connector bore, said spring accommodating region being provided to receive a spring element for the electrical contacting of the electrical mating contact, wherein an open space is provided in the spring accommodating region such that a properly inserted spring element can deflect into the open space when the mating contact is inserted. Furthermore, an electrical contact element comprising a spring sleeve is proposed, as well as a method for producing a contact element.