| Class | Class Name |
|---|---|
| 6 | ceiling panels of metal |
| 6 | ceilings of metal |
| 6 | celtium [hafnium] |
| 6 | cermets |
| 6 | chains and staples of metal for construction use |
| 6 | chains of metal |
| 6 | chains of metal (except driving chains for vehicles) |
| 6 | check rails of metal for railways |
| 6 | chests of metal |
| 6 | chicken-houses of metal |
| 6 | chill-molds [foundry] |
| 6 | chill-moulds |
| 6 | chill-moulds [foundry] |
| 6 | chimney cowls of metal |
| 6 | chimney pots of metal |
| 6 | chimney shafts of metal |
| 6 | chimneys of metal |
| 6 | chrome iron |
| 6 | chrome ores |
| 6 | chromium |
| 6 | cladding of metal for building |
| 6 | claddings of metal for ceilings |
| 6 | clamps of common metal |
| 6 | clasps of common metal |
| 6 | climbing platforms of metal |
| 6 | clips and clamps of metal |
| 6 | clips for cables and pipes |
| 6 | clips of common metal |
| 6 | clips of metal for cables |
| 6 | clips of metal for cables and pipes |
| 6 | clips of metal for sealing bags |
| 6 | clips of metal for tubes and pipes |
| 6 | closers of metal for doors (non-electric) |
| 6 | closure fixtures for door, of metal |
| 6 | closures of metal for containers |
| 6 | clothes hooks of metal |
| 6 | coat hooks of metal |
| 6 | cobalt |
| 6 | cobalt, raw |
| 6 | cold- and hot-rolled and welded tubes made from metal |
| 6 | cold- and hot-rolled steel strips |
| 6 | cold frames of metal |
| 6 | collars made wholly or principally of common metal |
| 6 | collars of metal for fastening pipes |
| 6 | collets of metal |
| 6 | columns of metal |
| 6 | columns of metal [parts of building] |
| 6 | combination locks of metal |
| 6 | common metal alloys |
| 6 | common metal pastes |
