Abstract: Method of manufacturing a ground apparatus and ground apparatus comprising an aluminum nut (16) having an internal thread and adapted to clamp an eyelet (28) of an electrical conductor on a corresponding contact area of the stud (12), wherein the nut (16) has at least one coating (30) which contains at least zinc, characterized in that the coating further comprises tin, in that the coating consists of an acid tin-zinc electroplating on the aluminum nut (16) and is such that the tin is between 60 and 80% by weight of the coating and the tin-zinc coating forms a layer with an average thickness of from about 5 to 16 microns.

Abstract: Method of manufacturing a ground apparatus and ground apparatus comprising an aluminum nut (16) having an internal thread and adapted to clamp an eyelet (28) of an electrical conductor on a corresponding contact area of the stud (12), wherein the nut (16) has at least one coating (30) which contains at least zinc, characterized in that the coating further comprises tin, in that the coating consists of an acid tin-zinc electroplating on the aluminum nut (16) and is such that the tin is between 60 and 80% by weight of the coating and the tin-zinc coating forms a layer with an average thickness of from about 5 to 16 microns

Abstract: A double-T stud with ring flanges at each end, for joining onto a workpiece surface. The stud including a joining portion and a head portion located at opposite ends of a shank. The head and joining portions formed as identical annular flanges with diameters greater than the shank portion. The stud is axially symmetrically in relation to a plane extending transverse to the shank.

Abstract: A punch rivet (1) has a cutting edge (6) which is arranged on the end face of its rivet shank (2) and is formed in the cutting region by an outer face (5) extending parallel to the axis and a conical inner face (4) of the rivet shank (2). The outer face (5) extends continuously parallel to the axis over the entire rivet shank (2) and the punch rivet (1) is provided with the same cutting edges (6, 7) on either side in an axially symmetrical design in the form of a tube.

Abstract: A punch rivet (1) has a cutting edge (6) which is arranged on the end face of its rivet shank (2) and is formed in the cutting region by an outer face (5) extending parallel to the axis and a conical inner face (4) of the rivet shank (2). The outer face (5) extends continuously parallel to the axis over the entire rivet shank (2) and the punch rivet (1) is provided with the same cutting edges (6, 7) on either side in an axially symmetrical design in the form of a tube.

Abstract: Electric welding device (5) for welding a fastening element (4), in particular a weld stud, on a workpiece with a stud holding means (1) comprising a conveying duct (2) which is connected at one end to a supply duct (3) and holds a fastening element (4) in its other end during the welding process and including a loading pin (6) which is displaceable to and fro along the axis of the longitudinal direction of the conveying duct. The pin has a shank part (13) and a head part (12) which can be brought to bear on a fastening element (4). At least the head part (12) of the loading pin (6) is an electrically insulating surface.