radial device for anchoring a flexible tubular structure in an opening in a rigid wall , characterized by flexible tubular structure having a bead reinforced by an armature with linked segments , embedded in rubber , composed of segments made integral by a nonrigid linking element in order to allow bead to bend in the axial direction so that it can slide into the hole in rigid wall . the invention applies to any industrial assembly , for example expansion joints , or any assembly on a vehicle , such as air suspension diaphragms .