Operations such as precision centerless grinding to tight diameter tolerances, hard chrome plating, induction hardening, or thread rolling performed after cold-finishing move a bar into the 'further worked' category. The key test is whether a value-adding process beyond the cold-forming step has been applied; if so, the product exits the cold-formed heading and may fall here, depending on the alloy type.

The final processing step governs classification: if precision grinding is the last operation, the bar is 'further worked than cold-formed' and belongs in this heading rather than the cold-formed alloy bar line (67639). Importers should document the full processing sequence from the manufacturer and consult a licensed customs broker to confirm the correct classification, as the distinction affects both duty liability and any applicable trade remedy exposure.