Embodiments disclose a contact part comprising a sleeve forming a receiving space for a plug-in contact to be inserted in an insertion direction; a contact spring secured to an inside of the sleeve, the contact spring comprising a first protrusion, a second protrusion and an intermediate section between the first and second protrusions; and a plate-shaped contact tab attached to the sleeve so as to form the receiving space between the contact tab and the contact spring, the contact tab comprising a profile oriented towards the contact spring, the profile having a flat portion extending towards the intermediate section of the contact spring. Applications for the present disclosure include high-current plug connections, such as those used in vehicles and onboard wiring systems.