This heading covers chains of cast iron (usually malleable cast iron), wrought iron or steel, regardless of their dimensions, process of manufacture or, in general, their intended use. It includes articulated link chain (e.g., roller chain, inverted tooth ( silent ) chain and Galle chain), non-articulated link chain including stud-link chain (whether forged, cast, welded, stamped from sheet or strip metal or made from wire, etc.), and ball chain. The heading includes :(1) Transmission chains for cycles, automobiles or machinery. (2) Anchor or mooring chains; lifting, haulage or towing chains; automobile skid chains. (3) Mattress chains, chains for sink stoppers, lavatory cisterns, etc. All these chains may be fitted with terminal parts or accessories (e.g., hooks, spring hooks, swivels, shackles, sockets, rings and split rings and tee pieces). They may or may not be cut to length, or obviously intended for particular uses. Iron or steel parts of chains specialised as such e.g., side links, rollers, spindles, etc., for articulated chain, links and shackles for non-articulated chain, also fall in this heading. The heading does not cover : (a) Chains having the character of imitation jewellery in the sense of heading 71.17 (e.g., watch chains and trinket chains). (b)Chains fitted with cutting teeth, etc., and used as chain saws or cutting tools (Chapter 82), or other articles in which chains play a subsidiary role such as bucket chains, conveyor hook chains or stretchers for textile finishing. (c) Door guards fitted with chains (heading 83.02). (d)Surveying chains (heading 90.15).
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