Notes. 1. For the purposes of this Chapter, parts of base metal are to be classified with their parent articles. However, articles of iron or steel of heading 73.12, 73.15, 73.17, 73.18 or 73.20, or similar articles of other base metal (Chapters 74 to 76 and 78 to 81) are not to be taken as parts of articles of this Chapter. 2. For the purposes of heading 83.02, the word "castors" means those having a diameter (including, where appropriate, tyres) not exceeding 75 mm, or those having a diameter (including, where appropriate, tyres) exceeding 75 mm provided that the width of the wheel or tyre fitted thereto is less than 30 mm.
GENERAL Whereas in Chapters 73 to 76 and 78 to 81 articles are classified according to a specific metal, this Chapter, like Chapter 82, covers certain particular classes of goods irrespective of the base metal of which they are composed. In general, parts of base metal are to be classified with their parent articles (see Chapter Note 1). However, the Chapter does not cover springs (even if specialised for locks, etc.), chains, cables, nuts, bolts, screws or nails; these goods are classified in the appropriate headings of Chapters 73 to 76 and 78 to 81 (see Note 2 to Section XV and Note 1 to this Chapter).
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