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HSChapter 73
U.S. imports of threaded nuts of iron or steel (HS 731816) totaled $105.1M in July 2026, traded with 58 countries.
Importers of Threaded Nuts of Iron or Steel paid $47.9M in duties in July 2026 — an effective duty rate of 47% on $101.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataThreaded nuts of iron or steel serve as essential mating fasteners across automotive, industrial machinery, and infrastructure applications, and the US tariff schedule carves out specific lines for automotive wheel lugnuts — chrome-plated non-locking (7318160015), locking (7318160030), and other lugnuts (7318160045) — alongside stainless steel nuts (7318160060) and general iron/steel nuts (7318160085). Taiwan leads US imports in this heading, with China second and Italy a notable supplier, particularly for precision and specialty grades. Goods of Chinese origin are subject to Section 301 tariffs, making Taiwan and other alternative sources strategically important for cost-sensitive buyers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
9.9K shipments/mo
Yes. The US schedule explicitly separates lug nuts into three dedicated lines: non-locking chrome-plated lugnuts (7318160015), locking lugnuts (7318160030), and other lugnuts (7318160045). General-purpose threaded nuts of stainless steel or other iron/steel fall under separate residual lines. Importers of automotive wheel hardware should confirm whether their product meets the lug nut definition to avoid misclassification.
Beyond standard commercial invoice and packing list requirements, importers of stainless steel nuts should be prepared to provide mill certificates or material test reports confirming alloy composition, since the stainless vs. non-stainless distinction drives classification between 7318160060 and 7318160085. If the goods originate in a country subject to antidumping or countervailing duty orders on steel fasteners, a scope ruling or CBP binding ruling may be advisable before the first shipment.
Subheading 2 of 12 in heading 7318
Subheading 731816 · $105.1M of $472.6M
ImportsExports
Imports
$105.1MYoY · Pro
Exports
$108.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Taiwan and China together supply 49% of it.
customs district
destination
entry
rate provision · imports
1.3% enters free of duty; the effective duty rate is 45.60%.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7318160085 | Other Threaded Nuts of Iron or Steel, NESOI | $80.6M | 47.62% | 97.27% | $38.4M |
| 7318160060 | Other Threaded Nuts of Stainless Steel | $17.5M | 34.69% | 90.09% | $6.1M |
| 7318160045 | Lugnuts of Iron or Steel, NESOI | $3.8M | 51.19% | 96.79% | $1.9M |
| 7318160030 | Locking Lugnuts of Iron or Steel | $2.3M | 45.92% | 97.68% | $1.1M |
| 7318160015 | Non-Locking Chrome-Plated Lugnuts of Iron or Steel | $941K | 52.08% | 100.00% | $490K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7318160000 | Nuts of Iron or Steel | $108.1M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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