square slider nut
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 7318160085 | 67.5% | CN | US | Official Doc |
| 7318160060 | 67.5% | CN | US | Official Doc |
| 8483408000 | 38.8% | CN | US | Official Doc |
| 8483908080 | 37.8% | CN | US | Official Doc |
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AI Analysis
π© Square Slider Nut (Industrial Hardware)
π HS Code Reference & Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: What is a "Square Slider Nut"?
A Square Slider Nut (also known as a T-nut or sliding square nut) is a fastener designed to slide into the channel of a workpiece (typically aluminum extrusion or T-slot profiles) and lock into place when a bolt is inserted. It is a critical component in modular framing systems, industrial machinery, and 3D printer assemblies.
In international trade, it is classified under "Iron or Steel" threaded articles. The specific HS Code depends heavily on the material composition (Standard Carbon Steel vs. Stainless Steel).
β οΈ Key Distinction:
- Standard Steel/Carbon Steel: Contains less than 0.05% carbon but includes other alloying elements typical of structural steel. β Classified under 7318.16.00.85.
- Stainless Steel: Alloys containing at least 10.5% Chromium. β Classified under 7318.16.00.60.
- NOT Machinery Parts: While used in machinery, these are generic fasteners, not classified under Chapter 84 (Machinery) like ball screws or gears.
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Match)
| HS Code | Product Description | Applicable Scenario | Material Type |
|---|---|---|---|
7318.16.00.85 |
Screws, bolts, nuts... of iron or steel: Nuts Other: Other | Standard Carbon Steel T-nuts, Black Oxide, Zinc-Plated, Galvanized Steel | β Carbon/Iron Steel |
7318.16.00.60 |
Screws, bolts, nuts... of iron or steel: Nuts Other: Of stainless steel | Stainless Steel (304/316) T-nuts, Silver Finish, Corrosion Resistant | β Stainless Steel |
8483.40.80.00 |
Transmission shafts... Ball or roller screws | β NOT APPLICABLE | N/A |
8483.90.80.80 |
Transmission shafts... Parts: Other | β NOT APPLICABLE | N/A |
π Critical Reminder:
- Do NOT classify Square Slider Nuts under 8483 (Transmission elements).
- 8483.40.80.00 refers to Ball/Roller Screws (precision mechanical transmission components), which are structurally and functionally different from simple sliding nuts.
- 8483.90.80.80 refers to Parts of gears/transmissions, not generic fasteners.
- Misclassification Risk: Declaring a steel nut as a "machine part" (Chapter 84) will lead to rejection, delays, and potential penalties because the HS Code7318is the specific provision for "Nuts of Iron or Steel."
π° III. 2026 Latest Tariff Rate Breakdown (Detailed Tax Clauses)
β Applicable Country: United States (US)
β Origin: China (CN)
β Effective Time: 2025/2026 Import Season
π― 1. 7318.16.00.85 ββ Standard Iron/Steel Square Slider Nuts
| Item | Detail |
|---|---|
| Base Tariff | 0.0% (Most Favored Nation / General Rate) |
| Section 301 Tariff | +7.5% (Additional duties on Chinese goods) |
| Steel/Aluminum/Copper Surcharge | +50% (Specific surcharge on steel/aluminum products under recent policies) |
| Total Tariff | 57.5% |
| Calculation Basis | CIF Value Γ 57.5% |
| De Minimis Exemption | β NOT Applicable (High tariff rate exceeds $800 threshold effectively due to surcharges) |
| Legal Basis Path | HTS:7318.16.00.85 β Section 301: Footnote 9903.88.03 β Steel Surcharge: 50% |
π Explanation:
- Although the base duty is 0%, the 50% Steel Surcharge is the dominant cost driver for steel products from China.
- The 7.5% Section 301 duty is also applied.
- Total: 57.5%. This is a very high tariff, significantly impacting profit margins.
π― 2. 7318.16.00.60 ββ Stainless Steel Square Slider Nuts
| Item | Detail |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Tariff | +7.5% |
| Steel/Aluminum/Copper Surcharge | +50% (Stainless steel is still classified under "steel" for this surcharge) |
| Total Tariff | 57.5% |
| Calculation Basis | CIF Value Γ 57.5% |
| De Minimis Exemption | β NOT Applicable |
| Legal Basis Path | HTS:7318.16.00.60 β Section 301: Footnote 9903.88.03 β Steel Surcharge: 50% |
π Note:
- Even though Stainless Steel is more expensive, it falls under the same 57.5% total tariff structure in this dataset.
- There is no tariff advantage for stainless steel vs. carbon steel in this specific HS subheading regarding the surcharge.
π― 3. Why 8483.40.80.00 and 8483.90.80.80 are NOT used
| HS Code | Description | Why It's Wrong for Slider Nuts |
|---|---|---|
8483.40.80.00 |
Ball or roller screws | Functional Mismatch: Slider nuts are passive fasteners. Ball screws are active transmission elements that convert rotary motion to linear motion with high precision. They are not interchangeable. |
8483.90.80.80 |
Parts of gears/transmissions | Classification Rule: General fasteners (nuts/bolts) are explicitly covered in Chapter 73. Chapter 84 parts are only for components specifically designed for the machinery in Chapter 84. A generic T-nut is a "hardware item," not a "machine part." |
| Tax Rate | 0.0% | While the tax is lower, using the wrong HS Code is illegal. Customs will reclassify and assess the 57.5% tariff plus penalties. |
π οΈ IV. Clearance Practical Advice (Pitfall Avoidance Guide)
β 1. Document Checklist (Mandatory)
| Document | Required? | Notes |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must specify Material (Carbon Steel vs. Stainless 304/316). |
| β Material Certificates | βοΈ | Mill test certificates for steel grade (e.g., AISI 304 for SS). |
| β Product Photos | βοΈ | Clear images of the square shape and threading. |
| β Commercial Invoice | βοΈ | Description: "Square Slider Nut, Steel, Grade 8.8, Model T-Slot" |
| β Bill of Lading | βοΈ | Ensure weight matches invoice. |
β 2. Declaration Tips (Golden Rules)
π₯ βMaterial is King, Description is Queen!β
| Scenario | Correct Declaration | Wrong Declaration | Consequence |
|---|---|---|---|
| Carbon Steel T-Nut | 7318.16.00.85"Steel Square Slider Nut" |
8483.40.80.00"Machine Part" |
Penalty + Back Taxes (57.5% + fines) |
| Stainless T-Nut | 7318.16.00.60"Stainless Steel Square Slider Nut" |
7318.16.00.85"Steel Nut" |
Possible Rejection (Material mismatch) |
| Mixed Package | Split Line Items | Mixed in one line | Audit Risk |
π Critical Advice:
- Always state "Steel" or "Stainless Steel" explicitly.
- Never use terms like "Part for 3D Printer" or "Machine Component" as the primary description, as this invites classification under Chapter 84.
β 3. Special Cases
| Case | Handling Advice |
|---|---|
| Coated Nuts (Zinc/Black Oxide) | Still 7318.16.00.85. Coating does not change material classification. |
| Plastic Inserts | If the nut has a plastic insert for self-tapping, it may still be 7318 if the primary material is steel. Consult customs broker. |
| Small Quantities (De Minimis) | β Cannot use Section 321. The 57.5% tariff exceeds the de minimis value threshold effectively, and steel surcharges are strictly enforced. |
π V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff Rate | Notes |
|---|---|---|---|
| πΊπΈ USA | 7318.16.00.85 (Steel)7318.16.00.60 (SS) |
57.5% | High steel surcharge applies. No de minimis exemption for steel. |
| π¨π³ China (Import) | 7318.16 |
~10-13% | Standard MFN rate. No Section 301. |
| πͺπΊ EU | 7318.15 / 7318.16 |
0-4% | No surcharges for steel fasteners in most cases. Check origin rules. |
| π¬π§ UK | 7318.15 / 7318.16 |
0-6% | Post-Brexit rates similar to EU for steel hardware. |
| π¨π¦ Canada | 7318.15 / 7318.16 |
0% | Free trade agreement benefits may apply. |
π Conclusion:
- USA is the most expensive market for these items due to the 57.5% total tariff.
- EU/Canada/UK are much more favorable for Chinese-origin steel hardware.
π VI. Common Errors & Pitfalls (Lessons Learned)
β Error 1: Classifying as 8483.40.80.00 (Ball Screw) to avoid tariffs.
π Consequence: Customs will reject the declaration, classify it correctly as 7318, and charge 57.5% + 25% penalty + legal fees.
β Error 2: Ignoring the material difference.
π Consequence: Declaring Stainless Steel as Carbon Steel (7318.16.00.85) can lead to under-declaration issues if the physical goods are inspected and found to be different grades.
β Error 3: Assuming small parts are exempt from surcharges.
π Consequence: The 50% Steel Surcharge applies to all steel articles, regardless of size or value. A tiny M4 nut is still taxed at 57.5%.
β Correct Practice:
"Square Slider Nut, 10mm, Carbon Steel, Black Oxide Finish, Model T-Slot 2020"
HS Code:7318.16.00.85
Tariff: 57.5%
π― VII. Conclusion: Professional Declaration, Cost Control
π― Key Takeaways:
πΉ "Steel is Steel, SS is SS" β Always distinguish material for correct HS Code.
πΉ "No Chapter 84 for Nuts" β Generic fasteners stay in Chapter 73.
πΉ "57.5% is the Real Cost" β Plan for high duties in the US market.
πΉ "No De Minimis for Steel" β Small packages are NOT exempt.
π Pro Tip:
If you are importing large volumes, consider Supply Chain Diversification to countries with lower steel surcharges (e.g., Vietnam, Thailand, Mexico) to reduce the 57.5% burden.
Apply for an Advance Ruling from CBP if your product has complex features (e.g., mixed materials) to ensure compliance.
π£ Act Now:
π Engage a licensed customs broker.
π¦ Verify material composition certificates.
π° Budget for 57.5% tariff for US imports.
π Ensure smooth clearance with accurate7318classification!
β¨ Precision in Classification, Savings in Tariffs!
πΌ Your hardware deserves the right code!
Customer Reviews
About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.