Chapter 73: Articles of iron or steel

HTS heading 7307: Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel

57 numbered lines under heading 7307, including 39 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.

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HTS heading 7307
HTS code	Description	Unit	General	Special	Column 2
7307	Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel:
	Cast fittings:
7307.11.00	Of nonmalleable cast iron		4.8%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	25%
7307.11.00.30	For threaded pipe	kg
	Other:
7307.11.00.45	For cast-iron soil pipe	kg
7307.11.00.60	Other	kg
7307.19	Other:
7307.19.30	Ductile fittings		5.6%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.19.30.40	Grooved-end fittings (including grooved couplings)	kg
	Other:
7307.19.30.60	Threaded	kg
7307.19.30.70	With mechanical, push-on (rubber compression) or flanged joints attached	kg
7307.19.30.85	Other	kg
7307.19.90	Other		6.2%	Free (A+,AU,BH,CL,CO,D,E,IL, JO,KR,MA, OM,P,PA,PE,S,SG)	45%
7307.19.90.30	Unions	kg
	Other:
7307.19.90.40	Grooved-end fittings (including grooved couplings)	kg
	Other:
7307.19.90.60	Threaded	kg
7307.19.90.80	Other	kg
	Other, of stainless steel:
7307.21	Flanges:
7307.21.10.00	Not machined, not tooled and not otherwise processed after forging	kg	3.3%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	34%
7307.21.50.00	Other	kg	5.6%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.22	Threaded elbows, bends and sleeves:
7307.22.10.00	Sleeves (couplings)	kg	Free		45%
7307.22.50.00	Other	kg	6.2%	Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.23.00	Butt welding fittings		5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.23.00.30	Not machined, not tooled and not otherwise processed after forming	kg
7307.23.00.90	Other	kg
7307.29.00	Other		5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.29.00.30	Nipples	kg
7307.29.00.90	Other	kg
	Other:
7307.91	Flanges:
	Not machined, not tooled and not otherwise processed after forging:
7307.91.10.00	Of iron or nonalloy steel	kg	3.3%	Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG)	25%
7307.91.30.00	Of alloy steel (except stainless steel)	kg	3.2%	Free (A*,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG)	33%
7307.91.50	Other		5.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 2.75% (JP)	45%
	With an inside diameter of less than 360 mm:
7307.91.50.10	Of iron or nonalloy steel	kg
7307.91.50.30	Of alloy steel (except stainless steel)	kg
	With an inside diameter of 360 mm or more:
7307.91.50.50	Of iron or nonalloy steel	kg
7307.91.50.70	Of alloy steel (except stainless steel)	kg
7307.92	Threaded elbows, bends and sleeves:
7307.92.30	Sleeves (couplings)		Free		45%
7307.92.30.10	Of iron or nonalloy steel	kg
7307.92.30.30	Of alloy steel (except stainless steel)	kg
7307.92.90.00	Other	kg	6.2%	Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 3.1% (JP)	45%
7307.93	Butt welding fittings:
	With an inside diameter of less than 360 mm:
7307.93.30	Of iron or nonalloy steel		6.2%	Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.93.30.10	Not machined, not tooled and not otherwise processed after forging	kg
7307.93.30.40	Other	kg
7307.93.60.00	Of alloy steel (except stainless steel)	kg	5.5%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
7307.93.90	With an inside diameter of 360 mm or more		4.3%	Free (A*,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)	45%
	Of iron or nonalloy steel:
7307.93.90.10	Not machined, not tooled and not otherwise processed after forging	kg
7307.93.90.40	Other	kg
7307.93.90.60	Of alloy steel (except stainless steel)	kg
7307.99	Other:
	Not machined, not tooled and not otherwise processed after forging:
7307.99.10.00	Of iron or nonalloy steelNote: See 9903.90.09.	kg	3.7%	Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG)	25%
7307.99.30.00	Of alloy steel (except stainless steel)	kg	3.2%	Free (A,AU,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG)	33%
7307.99.50	Other		4.3%	Free (A,AU,B,BH,CL,CO,D,E,IL,JO,JP,KR,MA,OM,P,PA,PE,S,SG)	45%
	Of iron or nonalloy steel:
7307.99.50.15	Nipples	kg
7307.99.50.45	Other	kg
7307.99.50.60	Of alloy steel (except stainless steel)	kg

Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.

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Source: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.