a touch fastener has a plurality of interspaced bonding elements arranged on a backing . each element has a head connected to the backing by a stem . to allow the head to always remain fastened to a body in the immediate vicinity , even if the backing is axially displaced over a predeterminable distance on a plane extending parallel to the body , the head has a disc with a diameter greater than the diameter at any point on the stem . the stem is conical and connected to the disk in an articulated manner by an articulated part .