20 Goods made of plastics, in particular, fastening elements made of plastic, namely, dowels, bolts, anchors, anchor bolts, hooks, nuts, rivets, threaded rods, washers for hardware, screws, nails, cable clips, pipe clips of plastic, cable clamps; sealing and covering caps made of plastic, rubber for screws, nuts and bolts; containers of plastic for commercial or industrial use for storing the aforesaid fastening elements; Non-metal injection anchor sleeves, non-metal centering sleeves; Fastening devices of plastic for fastening furniture fittings, and for lightweight building materials, namely, nuts, bolts, dowels, screws