7318.16.00.85/Heavy Hex Nuts ASTM A563 Grade DH/Mexico

Heavy Hex Nuts ASTM A563 Grade DH from Mexico

Heavy pattern hex nuts per ASTM A563 DH specification for high-strength structural bolting in bridges and buildings. HTS 7318.16.0085 covers these as 'other' threaded nuts of alloy steel. Wider across-flats design handles greater loads than standard hex nuts.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
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Import Tips

• Provide heat treatment and mechanical property certifications per ASTM specs

• Declare alloy composition precisely; avoid generic 'steel nut' descriptions

• Structural use requires traceability markings; inspect for proper stamping

Heavy Hex Nuts ASTM A563 Grade DH from Mexico — Import Duty Rate | HTS 7318.16.00.85