40 Material treatment information; metal treating; millworking; metal hardening; metal plating; galvanizing; coating of connecting elements of metal, plastic or ceramic, namely, applying coatings by means of galvanization to screws and rivets; coating of bonded, screwed or riveted connections, namely, applying coatings by means of galvanization of those goods; coating of connecting elements with/without internal threading and/or external threading, namely, applying coatings ultrasonically to medical and industrial apparatus; application of plastic products to connecting elements, namely, applying finishes to screws and rivets; application of adhesive, lubricating, sealing, insulating or protective layers to connecting elements, namely, applying coatings by means of galvanization to screws and rivets; application of securing, fixing, sealing, covering or protective elements to connecting elements, namely, applying finishes to screws and rivets; complete or partial coating, namely, galvanizing of small items of metal hardware with plastic products; coating, namely, galvanizing of threaded elements with cylindrical and/or conical threading; coating, namely, galvanizing of shafts, rivets, bolts, stud bolts, fittings, pins, stoppers, grooved pins, grooved nails, dowels, self-locking dowels, threaded elements, threaded pins, bushings, bolts, pins, slotted threaded bushings, threaded bushings for riveting, threaded inserts, screws, self-forming screws, trilobe screws, self-tapping threaded parts, thread-cutting threaded parts, nuts, rivet nuts, expanding nuts or nuts for riveting; coating, namely, galvanizing of threaded elements with nylon, polyolefin, plastisol, PVC, synthetic wax, insulating PTFE powder, microencapsulated liquid plastic or a non-reactive and film-forming polyamide suspension; coating of threaded elements by means of electrolytic processes, deposition, immersion, spraying, heating, melting, fusing; custom manufacturing of connecting elements of metal, plastic or ceramic; manufacturing, namely, custom manufacturing of connecting elements with/without internal threading and/or external threading; production, namely, custom production of threaded elements using forming processes; production, namely, custom production of threaded elements using cutting processes; production, namely, custom production of shafts, rivets, bolts, stud bolts, fittings, pins, stoppers, grooved pins, grooved nails, dowels, self-locking dowels, threaded elements, threaded pins, bushings, bolts, pins, slotted threaded bushings, threaded bushings for riveting, threaded inserts, screws, self-forming screws, trilobe screws, self-tapping threaded parts, thread-cutting threaded parts, nuts, rivet nuts, expanding nuts or nuts for riveting, for others