Tube or pipe fittings — HTS 7307
Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel
Chapter 73 › Heading 7307
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 7307 is a broad product category for tube or pipe fittings made of iron or steel. It generally includes fittings used to connect, redirect, extend, close, or adapt pipe or tubing, such as couplings, elbows, sleeves, tees, reducers, and similar articles. The heading describes the product family; it is not, by itself, the complete classification.
To reach the specific 8-digit HTSUS code, start with the fitting’s physical characteristics and intended use, then follow the subheadings under 7307. The tariff structure commonly separates fittings by material or manufacturing type—such as cast, forged, or other fittings—and by form, including elbows, bends, threaded fittings, flanges, butt-welding fittings, or other types. Confirm the exact subheading wording, statistical suffix, and any applicable legal notes in the current HTSUS.
What to check
- Identify the base material precisely, including whether the item is iron, carbon steel, stainless steel, or another steel type.
- Record how the fitting is made—such as cast, forged, machined, or formed—and do not assume similar-looking products share the same code.
- Describe the connection method and shape: threaded, socket-weld, butt-weld, flanged, elbow, tee, reducer, coupling, sleeve, or another design.
- Check the fitting’s specifications, drawings, and product literature against the exact 8-digit HTSUS descriptions and relevant section or chapter notes.
- Verify the classification with a qualified customs broker or request a binding tariff ruling when the material, construction, or intended use creates uncertainty.
HTS heading 7307 summary
Tube or pipe fittings is a 4-digit product category containing 3 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 7307.19 | Other |
| 7307.21 | Flanges |
| 7307.22 | Threaded elbows, bends and sleeves |
| 7307.91 | Flanges |
| 7307.92 | Threaded elbows, bends and sleeves |
| 7307.93 | Butt welding fittings |
| 7307.99 | Other |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 7307.11.00 👉 | Of nonmalleable cast iron | 4.8% | Free | 25% |
| 7307.23.00 👉 | Butt welding fittings | 5% | Free | 45% |
| 7307.29.00 👉 | Other | 5% | Free | 45% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 7307?
Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.