Abstract: A male or female plug component comprises a discrete tubular member, a resilient contact wire mat rolled up to have a generally cylindrical shape and a further member constituting at least part of the remainder of the plug component. The rolled-up wire mat has an inner part which extends through the interior of the tubular member. The end of the inner part of the rolled-up wire mat projects from within the interior of the tubular member past one end of the tubular member. At the other axial end of the tubular member, the rolled-up wire mat is bent around so as to have an outer part which surrounds the tubular member and extends longitudinally of the latter. The projecting end of the inner part of the wire mat is clamped to the further member.