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 method of welding a weld stud to a workpiece and of checking the strength of the welded joint includes the steps of providing a tool, a workpiece, and a weld stud, the weld stud including a shank and a polygonal shaped head; welding the weld stud onto the workpiece; applying the tool to the polygonal shaped head section of the stud; applying a predetermined test torque to the weld stud with the tool; and checking the welded joint for satisfactory acceptance of the test torque.

Abstract: A method of welding a weld stud to a workpiece and of checking the strength of the welded joint includes the steps of providing a tool, a workpiece, and a weld stud, the weld stud including a shank and a polygonal shaped head; welding the weld stud onto the workpiece; applying the tool to the polygonal shaped head section of the stud; applying a predetermined test torque to the weld stud with the tool; and checking the welded joint for satisfactory acceptance of the test torque.

Abstract: A welding stud includes a shank and a head flange, which projects radially relative to the shank and whose outer circumference is of polygonal design in order to be able to apply a test torque (T) to the stud by means of a tool. The flange includes an annular section (16) whose front facing and radially extending annular surface is designed as a welding surface. The annular section directly adjoins the flange, and the annular section and the flange form a head section which has a uniform outside diameter (D) throughout, and wherein the polygonal shape of the flange extends over the annular section up to its front annular surface.

Abstract: A welding stud includes a shank and a head flange, which projects radially relative to the shank and whose outer circumference is of polygonal design in order to be able to apply a test torque (T) to the stud by means of a tool. The flange includes an annular section (16) whose front facing and radially extending annular surface is designed as a welding surface. The annular section directly adjoins the flange, and the annular section and the flange form a head section which has a uniform outside diameter (D) throughout, and wherein the polygonal shape of the flange extends over the annular section up to its front annular surface.

Abstract: Described here is a method for pretreating the surfaces of weld parts of aluminum or alloys thereof, and weld parts produced with said method. Prior to welding, the weld parts are subjected to a treatment (17) in an acidic, aqueous solution, wherein the acidic, aqueous solution contains ions of the elements boron and/or silicon and/or titanium and/or zirconium and/or hafnium. The invention consists in that a polishing step (9) is carried out prior to the treatment in the acidic, aqueous solution to make for better sliding in a feed apparatus during the welding process.

Abstract: Described here is a method for pretreating the surfaces of weld parts of aluminum or alloys thereof, and weld parts produced with said method. Prior to welding, the weld parts are subjected to a treatment (17) in an acidic, aqueous solution, wherein the acidic, aqueous solution contains ions of the elements boron and/or silicon and/or titanium and/or zirconium and/or hafnium. The invention consists in that a polishing step (9) is carried out prior to the treatment in the acidic, aqueous solution to make for better sliding in a feed apparatus during the welding process.

Abstract: A fastening system is providing, the fastening system has a weld stud welded to a sheet metal surface at a weldment portion to form a weld joint. The system additionally has a fracturable nut coupled to the weld stud. The fracturable nut and stud construction is configured to fail under torsional load prior to the failure of the sheet metal or the weld joint.

Abstract: The present invention relates to a screw nut (10) for limiting an acting torque and a method corresponding thereto. The screw nut (10) has a threaded section (1) and a tubular section (2), where a predetermined breaking point (3) is arranged between the threaded section (1) and the tubular section (2), and where the threaded section (1) has a first shoulder structure (6) for a wrench and the tubular section (2) has a second shoulder structure (7) for an additional wrench.