7307.91.50.50
With an inside diameter of 360 mm or more / Of iron or nonalloy steel
Classification path
- Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel
- Other
- Flanges
- Other
- With an inside diameter of 360 mm or more
- Of iron or nonalloy steel
Rates of duty
- General (MFN)
- 5.5%
- Column 2Cuba, North Korea, Russia, Belarus
- 45%
- Unit of quantity
- kg
Trade agreement rates
Related lines in heading 7307
- 7307.11.00.30Cast fittings / Of nonmalleable cast iron / For threaded pipe4.8%
- 7307.11.00.45Cast fittings / Of nonmalleable cast iron / For cast-iron soil pipe4.8%
- 7307.11.00.60Cast fittings / Of nonmalleable cast iron / Other4.8%
- 7307.19.30.40Grooved-end fittings (including grooved couplings)5.6%
- 7307.19.30.60Cast fittings / Ductile fittings / Threaded5.6%
- 7307.19.30.70With mechanical, push-on (rubber compression) or flanged joints attached5.6%
- 7307.19.30.85Cast fittings / Ductile fittings / Other5.6%
- 7307.19.90.30Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel / Cast fittings / Unions6.2%
- 7307.19.90.40Grooved-end fittings (including grooved couplings)6.2%
- 7307.19.90.60Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel / Cast fittings / Threaded6.2%
- 7307.19.90.80Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel / Cast fittings / Other6.2%
- 7307.21.10.00Not machined, not tooled and not otherwise processed after forging3.3%
About heading 7307
Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel
Heading 7307 covers tube or pipe fittings of iron or steel, such as couplings, elbows, sleeves and flanges. It first separates cast fittings from other fittings, then splits stainless steel and other steel fittings by article type and processing.
Full guide to heading 7307Products in this heading
- Cast iron threaded pipe coupling
- Ductile iron grooved-end coupling
- Stainless steel threaded coupling (sleeve)
- Stainless steel butt welding elbow
- Steel pipe flange
- Threaded steel elbow
- Steel pipe nipple
- Mechanical joint pipe fitting
Frequently asked questions
What is the HTS code for a stainless steel threaded coupling?
Stainless steel threaded sleeves (couplings) are classified under 7307.22.10.00, with a general (MFN) rate of Free.
What is the duty on cast iron threaded pipe fittings?
Cast fittings of nonmalleable cast iron for threaded pipe are classified under 7307.11.00.30, with a general (MFN) rate of 4.8%.
How do I classify a grooved-end ductile iron coupling?
A grooved-end ductile iron coupling is classified under 7307.19.30.40, with a general (MFN) rate of 5.6%.
Source: USITC Harmonized Tariff Schedule, retrieved October 21, 2026.