HS 731815 · Iron / steel screws and bolts
Get the code right at quotation time, not at customs.
Misclassifying HS 731815 on the commercial invoice walks the cargo into the wrong duty rate, the wrong rebate column, and a customs hold that costs days of demurrage to clear. This page gives you the WCO heading, the product it most often covers, the China VAT export rebate rate, the US Section 301 status, the supplier provinces that ship it, and practitioner buying notes for first-time importers.
For an explanation of how the WCO Harmonized System is structured, what each digit means, and why misclassification is the most common landed-cost error first-time buyers make, see the HS code glossary entry.
Key facts
The numbers a buyer needs at the quotation stage. Verify each against the live source before invoicing; rates and rebate columns move.
| WCO heading | Other screws and bolts, with or without their nuts or washers |
|---|---|
| Chapter | 73, Articles of iron or steel |
| Industry segment | Iron and steel |
| Chinese name | 螺钉/螺栓 |
| China VAT export rebate | 13% Source: China State Taxation Administration (国家税务总局), 2025 schedule. Subject to change. |
| US Section 301 | 25% Source: USTR Section 301 List 1 / 2 / 3 / 4. Verify against the current schedule. |
| Major Chinese supplier provinces | Zhejiang, Jiangsu, Hebei, Guangdong |
Buying notes
Hex bolts, socket-head cap screws, machine screws, structural bolts, and self-drilling / self-tapping screws. Haiyan and Cixi (Zhejiang) and Yongnian (Hebei) are the global fastener clusters. Section 301 25% + Section 232 steel 25% on US import. Strength grade (ISO 8.8 / 10.9 / 12.9; SAE Grade 5 / 8) drives the price tier; the most common drift is grade-marking head stamps that don't match the underlying material strength. Specify the strength grade, surface treatment (zinc plate, zinc-nickel, hot-dip galvanise, dacromet), and require batch-level mechanical-test reports.
Common end uses
The applications that drive most of the global tonnage under this code.
- Structural construction (steel-frame buildings)
- Automotive engine and chassis assembly
- Industrial machinery assembly
- Wind-turbine flange bolts (high-strength)
- Furniture and consumer-product assembly
Where to read next
For the structure of the HS / Harmonized System, what each digit means, and why misclassification costs landed-cost margin, see the HS code glossary entry.
Need a quote on this code? Send us the HS code, the destination port, and the tonnage and we will quote FOB China and CIF / DDP landed including the current Section 301 and rebate position.
Read next
Other codes in the same chapter and the references behind them
HS Code
HS 730890 Iron / steel structures and parts
Chapter 73, Iron / steel structures and parts. China VAT rebate 13%.
HS Code
HS 732690 Other iron / steel articles
Chapter 73, Other iron / steel articles. China VAT rebate 13%.
HS Code
HS 731700 Iron / steel nails, tacks, staples
Chapter 73, Iron / steel nails, tacks, staples. China VAT rebate 13%.
HS Code
HS 730840 Steel scaffolding and shuttering equipment
Chapter 73, Steel scaffolding and shuttering equipment. China VAT rebate 13%.
HS Code
HS 731816 Iron / steel nuts
Chapter 73, Iron / steel nuts. China VAT rebate 13%.
Glossary
HS Code, Harmonized System Code
A six-digit international product classification code used by customs authorities worldwide to identify goods, assess duties, and apply trade controls. Countries extend the six-digit base with additional digits for tariff and statistical purposes (10-digit HTS in the US, 8-digit CN code in the EU, 10-digit AHECC in Australia).
Free download
Free PDF: thirty-point factory audit checklist used on every chemical-park site visit, mapped against the HS-code-leading Chinese producers.