U.S. imports of Threaded Nuts of Iron or Steel (HS 731816) totaled $105.7M in August 2026, imported from 60 countries.
Importers of Threaded Nuts of Iron or Steel paid $49.2M in duties in August 2026, an average duty rate of 46.82% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
10.1K import shipments a month
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 · $105.7M of $473.8M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7318160085 | Other Threaded Nuts of Iron or Steel, NESOI | $81.0M | 48.47% | 99.04% | $39.3M |
| 7318160060 | Other Threaded Nuts of Stainless Steel | $17.1M | 37.74% | 97.78% | $6.4M |
| 7318160045 | Lugnuts of Iron or Steel, NESOI | $3.1M | 52.50% | 99.93% | $1.6M |
| 7318160030 | Locking Lugnuts of Iron or Steel | $2.7M | 45.83% | 97.56% | $1.3M |
| 7318160015 | Non-Locking Chrome-Plated Lugnuts of Iron or Steel | $1.1M | 51.78% | 100.00% | $590K |
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 | $114.3M |
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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ImportsExports
Imports
$105.7MYoY · free account
Exports
$114.3MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $1.2B of Threaded Nuts of Iron or Steel and exported $1.2B.
Through August 2026. Source: U.S. Census Bureau.
Imports · August 2026
origin
Taiwan and China together supply 47% of it. China pays 56.7% duty; Italy 31.3%.
customs district
destination
entry
rate provision · imports
0.5% enters free of duty; duty collected equals 46.82% of imports for consumption.