Plastic Stoppers, Lids, Caps & Other Closures

A plastic closure that incorporates a pump mechanism, aerosol valve, or other mechanical dispensing device may be classified under Chapter 84 (mechanical appliances) or Chapter 96 (miscellaneous manufactured articles) depending on its essential character. Simple press-fit, screw, or snap-on closures without mechanical components remain in 3923. Importers of combination pump-closure assemblies should seek guidance from a licensed customs broker.

Mexican suppliers often compete on shorter lead times, lower freight costs, and USMCA origin eligibility, which eliminates Section 301 exposure applicable to Chinese goods. Chinese manufacturers typically offer broader product variety and lower unit costs at high volumes. For food-contact closures, FDA compliance documentation (resin identity, migration testing) is required regardless of origin and should be obtained from the manufacturer before importation.