The classification process requires working through the SITC schedule in order: if the metal has a dedicated heading (as titanium, tungsten, molybdenum, and others do), the article must be classified there. Only after confirming that no specific heading applies does the residual 'NES' category become appropriate. Importers dealing with less-common metals such as indium, rhenium, or bismuth in wrought form should document this elimination process in their classification records.

Because this heading aggregates many different metals, trade-remedy exposure varies entirely by the specific metal and its country of origin. Cobalt, indium, and other critical minerals have attracted increasing policy attention, and some forms may be subject to Section 301 tariffs if sourced from China. Importers should identify the precise metal, its form, and the applicable HTS subheading before assessing whether any antidumping, countervailing duty, or Section 301 measures apply.