Forged closures are produced by compressing metal under high pressure to achieve enhanced strength and density, and are classified separately (under 332111 for iron/steel or 332112 for nonferrous) from stamped closures (332119), which are formed by pressing sheet metal into shape. The manufacturing process — not just the end use — determines the correct classification.

Metal crowns and closures made from steel or aluminum may be subject to Section 232 tariff measures depending on their specific composition and HTS classification. Importers should verify the applicable HTS heading and check whether any product-specific exclusions have been granted, consulting a licensed customs broker for guidance.