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HSChapter 73
U.S. imports of threaded nuts of iron or steel (HS 731816) totaled $106.7M in April 2026, traded with 56 countries.
Importers of Threaded Nuts of Iron or Steel paid $44.5M in duties in April 2026 — an effective duty rate of 44% on $101.2M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 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.
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.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7318160085 | OTHER THREADED NUTS OF IRON OR STEEL, NESOI | $81.5M | 46.05% | $35.8M |
| 7318160060 | OTHER THREADED NUTS OF STAINLESS STEEL | $18.1M | 32.99% | $5.5M |
| 7318160045 | LUGNUTS OF IRON OR STEEL, NESOI | $3.2M | 49.27% | $1.5M |
| 7318160030 | LOCKING LUGNUTS OF IRON OR STEEL | $2.5M | 47.66% | $1.2M |
| 7318160015 | NON-LOCKING CHROME-PLATED LUGNUTS OF IRON OR STEEL | $1.3M | 45.81% | $587K |
OTHER THREADED NUTS OF IRON OR STEEL, NESOI
OTHER THREADED NUTS OF STAINLESS STEEL
LUGNUTS OF IRON OR STEEL, NESOI
LOCKING LUGNUTS OF IRON OR STEEL
NON-LOCKING CHROME-PLATED LUGNUTS OF IRON OR STEEL
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7318160000 | NUTS OF IRON OR STEEL | $106.8M |
NUTS OF IRON OR STEEL
5.5M kg
ARTICLES OF IRON OR STEEL NESOI
HS 732690
STRUCTURES AND PARTS NESOI OF IRON OR STEEL
HS 730890
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL
HS 731815
COOKING APPLIANCES ETC FOR GAS FUEL, IRON OR STEEL
HS 732111
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
SELF-TAPPING SCREWS OF IRON OR STEEL
HS 731814
| State | Imports | Exports | Balance |
|---|---|---|---|
| California | $16.2M | $19.5M | +$3.3M |
| Texas | $11.2M | $11.1M | -$142K |
| Ohio | $10.4M | $10.4M | -$49K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $22.1M | -- | -$22.1M |
| LAREDO, TX | -- | $15.6M | +$15.6M |
| LOS ANGELES INTERNATIONAL AIRPORT, CA | $3.7M | $10.8M | +$7.0M |