By-passes (diversion pipes) made of metal for conduits; vent valves mainly of metal (except as machine parts); blind plugs of metal for pipes; covering caps (blinds) made of metal for pipes; line connecting parts made of metal or of a combination of metal with plastics, whereby metal predominates, in particular for electric lines; branch pieces made of metal or of a combination of metal with plastics, whereby metal predominates, in particular for electric lines; connecting fittings made of metal or of a combination of metal with a non-metallic material, whereby metal predominates, for hoses or corrugated hoses serving for the protection of electric cables; connection angles or connection bows made of metal or of a combination of metal with a non-metallic material, whereby metal predominates, for hoses or corrugated hoses serving for the protection of electric cables; ball joints made of metal or of a combination of metal with plastics, whereby metal predominates, in particular for electric lines; reducers made of metal or of a combination of metal with plastics, whereby metal predominates, and reducing fitters made of metal or of a combination of metal with plastics, whereby metal predominates, for electric lines; cable and hose couplings and threaded hose couplings, mountings, clamps made of metal or of a combination of metal with plastics, whereby metal predominates, in particular for electric lines; sealing plugs made of metal or of a combination of metal with plastics, whereby metal predominates, for electric machines, for appliances, also for medical devices and appliances and/or for switch cupboards; housings made of metal or of a combination of metal with plastics, whereby metal predominates, for electric installations, with or without electric connections or with or without connections for electric or electronic components or appliances or for other electrotechnic purposes