HTS Heading 3916

Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics

All 8 HTS codes under heading 3916 (monofilament), with their duty rates from the 2026 HTS Revision 23. General duty 3.1% to 6.5%.

Every line of heading 3916

  • 3916 Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics.
  • 3916.10.00.00 Of polymers of ethylene (under: Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics) (kg): General 5.8%; Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 3916.20.00 Of polymers of vinyl chloride: General 5.8%; Special Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.
  • 3916.20.00.10 Siding for house or building exterior (kg).
  • 3916.20.00.20 Window, door, decking or railing profiles (m, kg).
  • 3916.20.00.91 Other (under: Of polymers of vinyl chloride) (kg).
  • 3916.90 Of other plastics (under: Monofilament of which any cross-sectional dimension exceeds 1 mm, rods, sticks and profile shapes, whether or not surface-worked but not otherwise worked, of plastics).
  • 3916.90.10.00 Of acrylic polymers (under: Of other plastics) (kg): General 6.5%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 40.6%.
  • 3916.90.20.00 Racket strings (under: Other) (m): General 3.1%; Special Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 30%.
  • 3916.90.30.00 Monofilament (under: Other) (m): General 6.5%; Special Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 50%.
  • 3916.90.50.00 Other (under: Other) (kg): General 5.8%; Special Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG); Column 2 35%.

From MFG Calcs data: Plastic semi-finished products

U.S. imports of plastic semi-finished products (headings 3916, 3917, 3920, 3921) came to $13.16B in 2025, with $1.29B in calculated duty: an effective duty of 9.8%, every duty included.

Effective duty in Sep 2026: 10.6%, against 13.0% in Sep 2025.

Largest sources in 2025: Canada $3.02B at 0.3% effective duty; Mexico $1.68B at 1.0% effective duty; China $984M at 47.4% effective duty; Germany $928M at 11.4% effective duty; South Korea $850M at 8.5% effective duty.

These are family totals from U.S. import statistics published through USITC DataWeb, not this heading's rate alone; effective duty is calculated duty as a share of customs value, an estimate, not a ruling.

About these rates

The rates are those printed in the 2026 HTS Revision 23, published by the U.S. International Trade Commission. A 10-digit statistical line takes the rates printed on the 8-digit line above it. Chapter 99 duties (Section 232, Section 301, IEEPA) depend on the product, the origin and the date, are charged on top, and are not included. A code here is a strong lead, not a ruling: confirm it with a customs broker or a CBP binding ruling.

Last reviewed 2026-11-12.