6
Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.
connection elements made of metal or metal alloy, namely, screws and threaded fasteners, bolts, headless screws [, nuts and rivets ]
20
Furniture, mirrors, picture frames; goods (not included in other classes) of wood, cork, reed, cane, wicker, horn, bone, ivory, whalebone, shell, amber, mother-of-pearl, meerschaum and substitutes for all these materials, or of plastics
[ connection elements made of plastic material, namely, screws and threaded fasteners, bolts, headless screws, nuts and rivets ]