Heading 7616 is a residual 'not elsewhere specified' category. Classification here is only correct after confirming the article does not fall under a more specific heading — for example, aluminum structures and structural parts go to a dedicated heading, aluminum foil to another, and aluminum tubes and pipes to yet another. Work through the chapter systematically before defaulting to 7616.

Aluminum fasteners under subheading 761610 may be subject to Section 232 tariff measures depending on origin. Antidumping or countervailing duty orders can also attach to specific fastener types from specific countries; importers should check the current order list at the relevant tariff line and country of origin.