What is HS 731815?
HS 731815 covers threaded bolts and screws made of iron or steel, including hex bolts, machine screws, structural bolts, and other fasteners with external threading. These components are classified within Chapter 73 of the Harmonized System, which governs articles of iron and steel. Importers should note that classification hinges on the threading — unthreaded or partially threaded fasteners may fall under adjacent subheadings, making accurate product description on customs declarations essential.
End-use applications span virtually every industrial sector: structural steel assemblies in construction, drivetrain and chassis components in automotive manufacturing, equipment frames in industrial machinery, PCB mounting hardware in electronics, and civil infrastructure projects globally. Demand for HS 731815 products closely tracks construction starts and automotive production volumes, making it a useful macro indicator as well as a procurement staple.
Top Sourcing Countries for Threaded Bolts and Screws (Steel/Iron)
China dominates global supply of HS 731815, holding the largest single share of US import volume by a substantial margin. Chinese manufacturers benefit from deeply integrated steel wire rod supply chains, high-volume cold-forming capacity, and export pricing that remains structurally lower than most competing origins. However, this cost advantage comes with significant trade remedy exposure — see the compliance section below.
Japan is the second-largest supplier to the US market, with a reputation for precision-grade fasteners serving automotive and electronics OEMs. German and Italian suppliers occupy the premium segment, offering high-specification fasteners for aerospace, automotive Tier 1, and heavy machinery applications where material certification and dimensional tolerances are non-negotiable.
Canada and Mexico supply the US market with the advantage of USMCA preferential treatment, making them cost-competitive on a landed-duty-paid basis despite higher base manufacturing costs. South Korea and India are both growing origins — Korea brings strong automotive supply chain alignment, while India offers increasingly competitive pricing on standard commercial fasteners backed by an expanding steel industry. For buyers seeking to diversify away from Chinese origin without sacrificing cost efficiency, India and Taiwan are the most strategically relevant alternatives to evaluate.
Import Duty Rates and Trade Agreements
The MFN (Most Favoured Nation) base duty rate for HS 731815 into the United States is 2.9%, applicable to the majority of trading partners without preferential agreements. On its face this is a modest tariff, but it is not the full picture for Chinese-origin goods.
Section 301 tariffs imposed on Chinese imports add a substantial additional layer of duty on top of the MFN rate, making Chinese-origin fasteners significantly more expensive on a landed basis than the headline 2.9% suggests. EU anti-dumping measures on Chinese steel fasteners have been in place for years and continue to be enforced, with similar regimes active in other jurisdictions. Importers sourcing from China must calculate total landed cost including all applicable trade remedy duties before making sourcing decisions.
USMCA (Canada and Mexico), bilateral FTAs with South Korea, and GSP-eligible origins including India offer duty reduction or elimination pathways that procurement teams should actively model. For high-volume buyers, even fractional duty differentials across large shipment quantities translate into material cost advantages.
Cost Drivers and Price Outlook
Steel wire rod is the primary feedstock for HS 731815 production, and its price is directly derived from upstream iron ore and coking coal costs. As of early 2026, iron ore prices have risen approximately 6.6% month-on-month, while coking coal has surged 14.6% over the same period — both signals pointing toward upward pressure on wire rod and, in turn, fastener input costs. Energy is a meaningful secondary cost driver given the electricity intensity of cold-forming operations, and crude oil benchmarks have also trended higher recently.
Chinese export pricing has historically acted as a ceiling suppressor on global fastener prices, but the combination of higher domestic input costs and ongoing trade remedy investigations means that pricing floor dynamics are shifting. The USD/CNY exchange rate remains a variable to monitor closely — CNY depreciation would partially offset input cost increases and sustain Chinese export competitiveness, while appreciation would erode it. Procurement teams should build commodity index clauses into supplier contracts where possible to manage input cost volatility.
Compliance and Sourcing Considerations
Transshipment risk is classified as HIGH for HS 731815. Customs authorities in the US, EU, and other jurisdictions have identified and prosecuted cases where Chinese-origin fasteners were routed through Vietnam, Malaysia, Taiwan, and other intermediate countries to circumvent anti-dumping duties. Origin fraud in this product category is not theoretical — it is a documented enforcement priority.
Buyers must conduct rigorous country-of-origin verification, including mill certificates traceable to the steel melt, manufacturing process documentation, and supplier audits. Customs brokers filing entries for steel fasteners should apply enhanced scrutiny to certificates of origin, particularly for shipments arriving from Southeast Asian transshipment hubs. False origin declarations expose importers to retroactive duty assessments, penalties, and potential seizure of goods. Building audit rights and origin warranty clauses into supplier contracts is a baseline requirement for any compliant procurement program in this category.
How to Source Threaded Bolts and Screws (Steel/Iron) Efficiently
Effective procurement of HS 731815 fasteners requires balancing cost, compliance, and supply continuity. Start by mapping your end-use specification requirements — standard commercial grade versus structural or precision-grade fasteners carry very different supplier qualification criteria and origin risk profiles.
- Qualify at least two approved origins to avoid single-country dependency, particularly given the volatility of trade remedy environments affecting Chinese supply.
- Request full traceability documentation from suppliers, including steel mill certificates, heat numbers, and country-of-origin declarations that can withstand customs audit.
- Model total landed cost across multiple origins, incorporating MFN rates, applicable trade remedy duties, freight, and insurance — not just unit price.
- Monitor steel wire rod and coking coal price indices monthly to anticipate fastener price movements and inform contract renegotiation timing.
- Engage a licensed customs broker experienced in Chapter 73 classifications to validate HS code accuracy and flag any anti-dumping order applicability before importing.
- Use trade intelligence platforms to track shifting import volumes by origin, which can signal emerging transshipment patterns or supplier base changes before they become compliance liabilities.
Get a free sourcing intelligence report for HS 731815 at Logitality.com