Heading 7326 applies only when no more specific heading in Chapter 73 — or elsewhere in the tariff schedule — covers the article. The correct approach is to work through the more specific headings (springs, chains, nails, bolts, sanitary ware, etc.) and confirm none applies before defaulting to 7326. CBP binding rulings are a reliable tool when the article's classification is genuinely ambiguous.

Articles made from iron or steel wire — such as wire baskets, racks, or formed wire shapes — go to 732620 when no earlier heading specifically covers them. Wire itself (not yet made into an article) classifies in headings covering wire by diameter and alloy. The distinction is between the raw wire product and a finished article fabricated from wire.