Abstract: A contact casing (1) rolled from a spring plate blank with a rotary safety zone (30) is present for anchoring and centering of this winding contact in the contact hole of a plastic housing, which rotary safety zone has a centering section (40) encompassing the winding post (3) in the form of a ring and is connected firmly with it and has a clamping section (41). Lateral indentations (34a, 34b) act as spring elements by which the longitudinal seam (37) of the centering section (40) is held closed in the case of acting torques and radial forces. The clamping section (41) comprises clamping arms (42a, 42b) which are firmly connected by way of the base part (32) with the centering section (40) and the claws (44a, 44b) of which project beyond the periphery of the centering section (40).