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Section XI: Textiles and Textile Articles

Chapter 51: Wool, fine or coarse animal hair; horsehair yarn and woven fabric

Chapter 51 of the U.S. Harmonized Tariff Schedule covers Wool, fine or coarse animal hair; horsehair yarn and woven fabric and sits within Section XI: Textiles and Textile Articles.

About Chapter 51

Chapter 51 contains 124 10-digit statistical lines grouped under 10 4-digit headings. Brokers, importers, and customs counsel use these codes to declare wool, fine or coarse animal hair; horsehair yarn and woven fabric on entry summaries (CBP Form 7501) and to look up the applicable Column 1, Special, and Column 2 duty rates.

General (Column 1) duty rates for ad-valorem lines in Chapter 51 range from 2.7% to 25%, with a median of 7%. About 23% of the chapter's lines (29 of 124) enter duty-free under the general rate. Special-program rates (USMCA, KORUS, GSP, AGOA, and others) and Chapter 99 overlays modify these base rates for qualifying shipments.

Every code page links into the Tandom Tariff Calculator with the HTS code prefilled, so you can compute the full landed duty for a specific shipment by entering value, country of origin, and (where relevant) material content or date of entry. Tandom's data refreshes daily from USITC HTSUS, CBP CSMS, the Federal Register, and the Department of Commerce — the same authoritative sources the trade community files against.

5101Wool, not carded or combed:

CodeDescriptionGeneralColumn 2SpecialUnits
5101.11·Shorn wool:
5101.11.10.00···Wool for special usesFreeFree, under bondcy kg, kg
5101.11.20.00····Unimproved wool; other wool, not finer than 40sFree55.1¢/clean kgcy kg, kg
5101.11.40.00····Other wool, finer than 40s but not finer than 44sFree66.1¢/clean kgcy kg, kg
5101.11.50.00····Other wool, finer than 44sFree77.2¢/clean kgcy kg, kg
5101.11.60··Other18.7¢/clean kg77.2¢/clean kgFree (AU,BH, CL,CO,E,IL, JO,KR, MA,OM,P, PA,PE,S,SG)
5101.11.60.30···Not finer than 58scy kg, kg
5101.11.60.60···Finer than 58scy kg, kg
5101.19·Other:
5101.19.10.00···Wool for special usesFreeFree, under bondcy kg, kg
5101.19.20.00····Unimproved wool; other wool, not finer than 40sFree55.1¢/clean kgcy kg, kg
5101.19.40.00····Other wool, finer than 40s but not finer than 44sFree66.1¢/clean kgcy kg, kg
5101.19.50.00····Other wool, finer than 44sFree77.2¢/clean kgcy kg, kg
5101.19.60··Other18.7¢/clean kg77.2¢/clean kgFree (AU,BH,CL,CO,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5101.19.60.30···Not finer than 58scy kg, kg
5101.19.60.60···Finer than 58scy kg, kg
5101.21·Shorn wool:
5101.21.10.00····Wool for special usesFreeFree, under bondcy kg, kg
5101.21.15.00·····Unimproved wool; other wool, not finer than 40sFree59.5¢/clean kgcy kg, kg
5101.21.30.00·····Other wool, finer than 40s but not finer than 44sFree70.6¢/clean kgcy kg, kg
5101.21.35.00·····Other wool, finer than 44sFree81.6¢/clean kgcy kg, kg
5101.21.40···Other20.6¢/clean kg81.6¢/clean kgFree (AU,BH, CL,CO,E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)
5101.21.40.30····Not finer than 58scy kg, kg
5101.21.40.60····Finer than 58scy kg, kg
5101.21.65.00···Unimproved wool; other wool, not finer than 46s.Free81.6¢/kg + 20%kg
5101.21.70.00···Other6.5¢/kg + 5.3%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5101.29·Other:
5101.29.10.00····Wool for special usesFreeFree, under bondcy kg, kg
5101.29.15.00·····Unimproved wool; other wool, not finer than 40sFree59.6¢/clean kgcy kg, kg
5101.29.30.00·····Other wool, finer than 40s but not finer than 44sFree70.6¢/clean kgcy kg, kg
5101.29.35.00·····Other wool, finer than 44sFree81.6¢/clean kgcy kg, kg
5101.29.40···Other20.6¢/clean kg81.6¢/clean kgFree (AU,BH,CL,CO,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5101.29.40.30····Not finer than 58scy kg, kg
5101.29.40.60····Finer than 58scy kg, kg
5101.29.65.00···Unimproved wool; other wool, not finer than 46sFree81.6¢/kg + 20%kg
5101.29.70.00···Other6.5¢/kg + 5.3%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5101.30Carbonized:
5101.30.10.00··Unimproved wool; other wool, not finer than 40sFree75.1¢/kgkg
5101.30.15.00··Other wool, finer than 40s but not finer than 44sFree86.1¢/kgkg
5101.30.30.00··Other wool, finer than 44s but not finer than 46sFree97¢/kgkg
5101.30.40.00··Other24.4¢/kg97¢/kgFree (AU,BH, CL,CO,E,IL,JO, KR,MA,OM,P, PA,PE,S,SG)kg
5101.30.65.00··Unimproved wool; other wool, not finer than 46sFree81.6¢/kg + 20%kg
5101.30.70.00··Other6.5¢/kg + 5.3%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg

5102Fine or coarse animal hair, not carded or combed:

CodeDescriptionGeneralColumn 2SpecialUnits
5102.11·Of Kashmir (cashmere) goats:
5102.11.10.00··Not processed in any manner beyond the degreased or carbonized condition5.1¢/clean kg46.3¢/clean kgFree (AU,BH, CL,CO,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)cy kg, kg
5102.11.90.00··Other4.9¢/kg + 4%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)cy kg, kg
5102.19·Other:
5102.19.20.00···Hair of the camel5¢/clean kg55¢/clean kgFree (AU,BH, CL,CO,E,IL,JO, KR,MA,OM, P,PA,PE,S,SG)cy kg, kg
5102.19.60···Other0.4%6.9%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5102.19.60.30····Hair of the Angora goatcy kg, kg
5102.19.60.60····Othercy kg, kg
5102.19.80.00···Fur, prepared for hatters' useFree35%kg
5102.19.90.00···Other4.9¢/kg + 4%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5102.20.00.00Coarse animal hairFreeFreekg

5103Waste of wool or of fine or coarse animal hair, including yarn waste but excluding garnetted stock:

CodeDescriptionGeneralColumn 2SpecialUnits
5103.10.00.00Noils of wool or of fine animal hair2.6¢/kg50.7¢/kgFree (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5103.20.00.00Other waste of wool or of fine animal hair2.6¢/kg55.1¢/kgFree (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5103.30.00.00Waste of coarse animal hair7%30%Free (AU,BH,CL,CO,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg

5104Garnetted stock of wool or of fine or coarse animal hair

CodeDescriptionGeneralColumn 2SpecialUnits
5104.00.00.00Garnetted stock of wool or of fine or coarse animal hairFree57.3¢/kgkg

5105Wool and fine or coarse animal hair, carded or combed (including combed wool in fragments):

CodeDescriptionGeneralColumn 2SpecialUnits
5105.10.00.00Carded wool (400)6.5¢/kg + 5.3%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5105.21.00.00·Combed wool in fragments (400)3.7¢/kg + 3%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5105.29.00.00·Other (400)3.9¢/kg + 3.1%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5105.31.00.00·Of Kashmir (cashmere) goats (400)6.8¢/kg + 5.5%81.6¢/kg + 20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5105.39.00.00·Other (400)6.8¢/kg + 5.5%81.6¢/kg +20%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5105.40.00.00Coarse animal hair, carded or combedFree20%kg

5106Yarn of carded wool, not put up for retail sale:

CodeDescriptionGeneralColumn 2SpecialUnits
5106.10.00Containing 85 percent or more by weight of wool6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5106.10.00.10·Of which the average fiber diameter is not less than 34.40 microns (400)kg
5106.10.00.90·Other (400)kg
5106.20.00.00Containing less than 85 percent by weight of wool (400)6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg

5107Yarn of combed wool, not put up for retail sale:

CodeDescriptionGeneralColumn 2SpecialUnits
5107.10Containing 85 percent or more by weight of wool:
5107.10.30.00·Of wool fiber with an average fiber diameter of 18.5 microns or less (400)6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5107.10.60.00·Other (400)6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5107.20Containing less than 85 percent by weight of wool:
5107.20.30.00·Of wool fiber with an average fiber diameter of 18.5 microns or less (400)6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5107.20.60.00·Other (400)6%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg

5108Yarn of fine animal hair (carded or combed), not put up for retail sale:

CodeDescriptionGeneralColumn 2SpecialUnits
5108.10Carded:
5108.10.30.00·Of Angora rabbit hair (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5108.10.40.00·Of mohair (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5108.10.80.00·Other (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5108.20Combed:
5108.20.30.00·Of Angora rabbit hair (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5108.20.40.00·Of mohair (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
5108.20.80.00·Other (400)4%55.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg

5109Yarn of wool or of fine animal hair, put up for retail sale:

CodeDescriptionGeneralColumn 2SpecialUnits
5109.10Containing 85 percent or more by weight of wool or of fine animal hair:
5109.10.20.00·Yarn of wool, colored (dyed or printed) and cut into uniform lengths of not over 8 cm (400)FreeFreekg
5109.10.40.00··Of Angora rabbit hair (400)4%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg
5109.10.80.00···Of wool fiber with an average fiber diameter of 18.5 microns or less (400)6%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg
5109.10.90.00···Other (400)6%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg
5109.90Other:
5109.90.20.00·Yarn of wool, colored (dyed or printed) and cut into uniform lengths of not over 8 cm (400)FreeFreekg
5109.90.40.00··Of Angora rabbit hair (400)4%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg
5109.90.80.00···Of wool fiber with an average fiber diameter of 18.5 microns or less (400)6%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg
5109.90.90.00···Other (400)6%55.5%Free (AU,BH, CL,CO,IL,JO,KR, MA,OM, P,PA,PE,S,SG)kg

5110Yarn of coarse animal hair or of horsehair (including gimped horsehair yarn), whether or not put up for retail sale

CodeDescriptionGeneralColumn 2SpecialUnits
5110.00.00.00Yarn of coarse animal hair or of horsehair (including gimped horsehair yarn), whether or not put up for retail saleFree20%kg

5111Woven fabrics of carded wool or of carded fine animal hair:

CodeDescriptionGeneralColumn 2SpecialUnits
5111.11·Of a weight not exceeding 300 g/m2:
5111.11.20.00··Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.11.30.00···Hand-woven, with a loom width of less than 76 cm (410)10%$1.10/kg + 60%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.11.70···Other25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5111.11.70.30····Wholly or in part of fine animal hair (410)m2, kg
5111.11.70.60····Other (410)m2, kg
5111.19·Other:
5111.19.10.00··Tapestry fabrics and upholstery fabrics (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.19.20.00···Hand-woven, with a loom width of less than 76 cm (410)10%$1.10/kg + 60%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.19.60···Other25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5111.19.60.20·····Weighing not more than 400 g/m2 (410)m2, kg
5111.19.60.40·····Weighing more than 400 g/m2 (410)m2, kg
5111.19.60.60·····Weighing not more than 400 g/m2 (410)m2, kg
5111.19.60.80·····Weighing more than 400 g/m2 (410)m2, kg
5111.20Other, mixed mainly or solely with man-made filaments:
5111.20.05.00·Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.20.10.00·Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.20.90.00·Other (410)25%48.5¢/kg + 68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.30Other, mixed mainly or solely with man-made staple fibers:
5111.30.05.00·Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.30.10.00·Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.30.90.00·Other (410)25%48.5¢/kg + 68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.90Other:
5111.90.30.00·Containing 30 percent or more by weight of silk or silk waste, valued over $33/kg (410)6.9%80%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.90.40.00··Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.90.50.00··Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5111.90.90.00··Other (410)25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg

5112Woven fabrics of combed wool or of combed fine animal hair:

CodeDescriptionGeneralColumn 2SpecialUnits
5112.11·Of a weight not exceeding 200g/m2:
5112.11.10.00··Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.11.30···Of wool yarns with an average fiber diameter of 18.5 microns or less25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5112.11.30.30····Containing fine animal hair (410)m2, kg
5112.11.30.60····Other (410)m2, kg
5112.11.60···Other25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5112.11.60.30····Wholly or in part of fine animal hair (410)m2, kg
5112.11.60.60····Other (410)m2, kg
5112.19·Other:
5112.19.20.00··Tapestry fabrics and upholstery fabrics (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.19.60···Of wool yarns with an average fiber diameter of 18.5 microns or less25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5112.19.60.10·····Weighing not more than 270 g/m2 (410)m2, kg
5112.19.60.20·····Weighing more than 270 g/m2 but not more than 340 g/m2 (410)m2, kg
5112.19.60.30·····Weighing more than 340 g/m2 (410)m2, kg
5112.19.60.40·····Weighing not more than 270 g/m2 (410)m2, kg
5112.19.60.50·····Weighing more than 270 g/m2 but not more than 340 g/m2 (410)m2, kg
5112.19.60.60·····Weighing more than 340 g/m2 (410)m2, kg
5112.19.95···Other25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5112.19.95.10·····Weighing not more than 270 g/m2 (410)m2, kg
5112.19.95.20·····Weighing more than 270 g/m2 but not more than 340 g/m2 (410)m2, kg
5112.19.95.30·····Weighing more than 340 g/m2 (410)m2, kg
5112.19.95.40·····Weighing not more than 270 g/m2 (410)m2, kg
5112.19.95.50·····Weighing more than 270 g/m2 but not more than 340 g/m2 (410)m2, kg
5112.19.95.60·····Weighing more than 340 g/m2 (410)m2, kg
5112.20Other, mixed mainly or solely with man-made filaments:
5112.20.10.00·Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.20.20.00·Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.20.30.00·Other (410)25%48.5¢/kg + 68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.30Other, mixed mainly or solely with man-made staple fibers:
5112.30.10.00·Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.30.20.00·Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.30.30.00·Other (410)25%48.5¢/kg + 68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.90Other:
5112.90.30.00·Containing 30 percent or more by weight of silk or silk waste, valued over $33/kg (410)6.9%80%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.90.40.00··Tapestry fabrics and upholstery fabrics of a weight exceeding 300 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.90.50.00··Tapestry fabrics and upholstery fabrics of a weight not exceeding 140 g/m2 (414)7%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg
5112.90.90··Other25%68.5%Free (AU,BH,CL,CO,IL,JO,KR,MA,OM,P,PA,PE,S,SG)
5112.90.90.10···Mixed mainly or solely with cotton (410)m2, kg
5112.90.90.90···Other (410)m2, kg

5113Woven fabrics of coarse animal hair or of horsehair

CodeDescriptionGeneralColumn 2SpecialUnits
5113.00.00.00Woven fabrics of coarse animal hair or of horsehair2.7%40%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)m2, kg

Frequently asked questions

What does HTS Chapter 51 cover?

Chapter 51 of the U.S. Harmonized Tariff Schedule (HTSUS) covers Wool, fine or coarse animal hair; horsehair yarn and woven fabric. It sits within Section XI: Textiles and Textile Articles. Tandom's catalog lists all 124 10-digit statistical lines and 10 4-digit headings in this chapter.

What is the typical U.S. duty rate for Chapter 51 imports?

General (Column 1) duty rates for ad-valorem lines range from 2.7% to 25% (median 7%); roughly 40% of lines enter duty-free. Use the calculator linked from each code page to compute the full landed rate, including Section 301/232 overlays, IEEPA tariffs, and AD/CVD deposits where applicable.

Are Section 301 or Section 232 tariffs applied to Chapter 51 products?

Section 301 (China) and Section 232 (steel, aluminum, copper) tariffs are layered on top of the base HTSUS rate via Chapter 99 provisions. Whether they apply to a specific 10-digit line in Chapter 51 depends on the product's country of origin, material content, and the active proclamation. Open any code in this chapter to see the live overlay stack and effective rate.

Are there antidumping or countervailing duty (AD/CVD) orders covering Chapter 51 products?

AD/CVD orders are issued at the case level by the Department of Commerce against specific products from specific countries. Tandom's AD/CVD catalog cross-references every active order to the HTS codes it covers — open any code in Chapter 51 to see flagged orders, deposit rates, and the underlying scope determinations.