750890 captures nickel articles that do not fit a more specific heading — examples include nickel anodes for electroplating, nickel crucibles, nickel-clad components, and miscellaneous industrial hardware. If a nickel article could plausibly fall under a heading for a specific article type (such as springs, bolts, or valves) in another chapter, that more specific heading takes precedence over the residual classification here.

Nickel wire is classified under heading 7505 as a semi-finished wrought product. Once that wire is woven, knitted, or otherwise formed into cloth, grill, or netting, the resulting article is classified under 750810 as a fabricated article. The distinction matters because the two headings carry different tariff rates and may have different trade-remedy exposure, so the state of manufacture at the time of importation determines the correct classification.