6 Common metals and their alloys; pipes and tubes of metal; metal fasteners, namely, bolts and screws; metal lock nuts; pipe assemblies, namely, metal pipes and tubes and metal pipe couplings and pipe assemblies, namely, metal pipes or tubes and metal pipe couplings and joints, assemblies comprised of metal pipes or tubes or including carbon fibre composite pipes or tubes with junctions, couplings, joints, pipe fittings, pipe collars and pipe connectors and ducts therefor, all of metal, metal air conditioning ducts, metal heating ducts, ventilating ducts of metal, metal ducts for fluid transport, fabrications comprised of metallic fittings, brackets, pressings, sheet details and fasteners; components, namely, metal pipes and tubes, and metal pipes and fittings for joining pipes together; pipe assemblies, namely, metal pipes and tubes and metal pipe couplings, and joints and pipe assemblies, namely, metal pipes or tubes and metal pipe couplings and joints, assemblies comprised of metal pipes or tubes or including carbon fibre composite pipes or tubes with junctions, couplings, joints, pipe fittings, pipe collars and pipe connectors and ducts therefor, all of metal, metal air conditioning ducts, metal heating ducts, ventilating ducts of metal, metal ducts for fluid transport, fabrications comprised of metallic fittings, brackets, pressings, sheet details and fasteners for aircraft fluid systems; metal components, namely, pipes, tubes, and fittings for joining pipes together for aircraft fluid systems; rigid pipe assemblies, namely, rigid metal components, namely, pipes, tubes and fittings for joining pipes together; metal rigid pipe couplings and joints and pipe assemblies, namely, metal pipes or tubes and metal pipe couplings and joints, assemblies comprised of metal pipes or tubes or including carbon fibre composite pipes or tubes with junctions, couplings, joints, pipe fittings, pipe collars and pipe connectors and ducts therefor, all of metal, metal air conditioning ducts, metal heating ducts, ventilating ducts of metal, metal ducts for fluid transport, fabrications comprised of metallic fittings, brackets, pressings, sheet details and fasteners for aircraft fluid systems to transfer oil, fuel or air throughout the airframe or basic structure of an aircraft and/or to onboard systems, such as engines; goods of common metal not included in other classes, namely, alloys of common metal and semi-wrought common metals; replacement parts and structural fittings for all the aforesaid goods; all of the above only for the aerospace, aeronautical, automotive, composites, defense, marine, medical, and motor sport industries; all of the aforesaid to exclude gaskets and gasket material; and all of the aforesaid to exclude metal nail plates and metal roof flashing; none of the aforesaid for use in electrical wiring or for grounding electrical fixtures