HTS heading 7318 · Chapter 73, Articles of iron or steel
US imports of Screws, bolts, nuts, coach screws, screw hooks, rivets
Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
US imports under HTS 7318 at a glance
Between March and July 2026, US importers entered $2.35 billion of screws, bolts, nuts, coach screws, screw hooks, rivets under HTS heading 7318, from 50 of the 55 origin countries covered here and across 48 ten-digit tariff lines — roughly $470 million a month of customs value under a single four-digit heading.
Chapter 73 covers articles of iron or steel; heading 7318 is one of its larger entries by value, which is why the duty treatment below is worth checking line by line.
Top origin countries by share of HTS 7318
Origin countries: value, share and duty paid
| Origin | Import value | Share | Dutiable share | Effective duty | Duty per $100 | Detail |
|---|---|---|---|---|---|---|
| Taiwan | $704 million | 29.9% | 99.4% | 51.59% | $51.25 | Duty on 7318.14.10 |
| China | $374 million | 15.9% | 99.7% | 71.21% | $70.98 | Duty on 7318.15.20 China lane |
| Japan | $241 million | 10.3% | 98.7% | 50.28% | $49.64 | Duty on 7318.16.00 |
| Germany | $145 million | 6.2% | 97.6% | 49.22% | $48.04 | Duty on 7318.15.80 |
| Italy | $132 million | 5.6% | 96.3% | 41.10% | $39.58 | Duty on 7318.16.00 Italy lane |
| Canada | $128 million | 5.4% | 70.3% | 35.99% | $25.31 | |
| India | $117 million | 5% | 99.3% | 48.95% | $48.58 | Duty on 7318.15.50 India lane |
| South Korea | $106 million | 4.5% | 99.7% | 48.78% | $48.62 | Duty on 7318.15.20 |
| Mexico | $63.7 million | 2.7% | 82.1% | 42.01% | $34.48 | |
| France | $52.5 million | 2.2% | 92.7% | 44.31% | $41.06 | Duty on 7318.16.00 |
| United Kingdom | $45.3 million | 1.9% | 92.5% | 37.96% | $35.12 | Duty on 7318.15.20 |
| Thailand | $42.4 million | 1.8% | 99.6% | 53.96% | $53.73 | Duty on 7318.15.80 Thailand lane |
| Vietnam | $41.8 million | 1.8% | 99.5% | 53.57% | $53.29 | Duty on 7318.15.80 Vietnam lane |
| Turkey | $23.5 million | 1% | 98.9% | 51.20% | $50.65 | Duty on 7318.15.80 |
| Malaysia | $15.6 million | 0.7% | 95.5% | 49.59% | $47.34 | Duty on 7318.16.00 |
Who exports screws, bolts, nuts, coach screws, screw hooks, rivets to the United States
Taiwan is the largest origin with $704 million, or 29.9% of the heading, with China at 15.9% and Japan at 10.3%. The top three take 56.1% between them — enough concentration to matter when one origin's duty treatment changes, but not so much that a buyer has no alternative to qualify.
Canada and Mexico sit near the top of the table, and the duty numbers reflect it: Canada entered 29.7% of its value free of duty and Mexico entered 17.9% of its value free of duty. Cargo that qualifies under USMCA and is claimed correctly at entry pays nothing; cargo that does not qualify, or that is never claimed, pays the ordinary rate. The certification is the whole difference.
What importers actually paid in duty
Almost everything under this heading is dutiable: 96.4% of entered value carried duty, and CBP collected $1.19 billion over the five months. The effective rate on dutiable value was 52.3%, which works out to $50.46 of duty per $100 of goods. There is no meaningful duty-free channel here — classification and origin are the only levers.
The spread between origins is real. Among origins with at least 2% of the heading, China paid the most duty relative to value — $70.98 per $100 — while Canada paid $25.31. On a $250,000 purchase order that gap is about $114,000 in duty alone, which is worth pricing into a sourcing decision rather than discovering on the entry summary.
10-digit tariff lines under HTS 7318
| HTS code | Description | Import value | Share | Duty per $100 | Largest origin |
|---|---|---|---|---|---|
| 7318.16.00.85 | Nuts | $399 million | 17% | $45.67 | Taiwan |
| 7318.14.10.60 | Other | $267 million | 11.4% | $53.14 | Taiwan |
| 7318.29.00.00 | — | $130 million | 5.5% | $47.57 | China |
| 7318.15.20.95 | Bolts and bolts and their nuts or washers entered or exported in the same shipment | $128 million | 5.5% | $49.76 | China |
| 7318.15.80.66 | Having shanks or threads with a diameter of 6 mm or more | $125 million | 5.3% | $56.00 | Taiwan |
| 7318.22.00.00 | — | $106 million | 4.5% | $49.19 | China |
| 7318.15.20.65 | Bolts and bolts and their nuts or washers entered or exported in the same shipment | $95.9 million | 4.1% | $52.79 | China |
| 7318.15.80.85 | Having shanks or threads with a diameter of 6 mm or more | $94.5 million | 4% | $52.50 | Germany |
| 7318.16.00.60 | Nuts | $91.6 million | 3.9% | $33.60 | Italy |
| 7318.15.80.69 | Having shanks or threads with a diameter of 6 mm or more | $75.6 million | 3.2% | $57.34 | Japan |
| 7318.14.50.80 | — | $73.5 million | 3.1% | $53.95 | Taiwan |
| 7318.15.50.90 | — | $69.2 million | 2.9% | $46.53 | Germany |
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
The 10-digit lines under heading 7318
48 ten-digit lines carried trade under this heading in the period. The largest, 7318.16.00.85 (nuts), took 17% of the heading at $399 million. 7318.14.10.60, 7318.29.00.00 and 7318.15.20.95 follow. Rates diverge between those lines, so the classification your broker files is worth checking against the goods rather than carried over from the last entry.
What the duty stack looks like
The rate on an entry is not one number. It is a stack: the general (column 1) rate for the 10-digit line, less any trade-agreement preference the goods qualify for, plus whatever additional duties apply to that product and origin, all applied to the customs value declared. The $50.46 per $100 above is what that stack averaged across every entry in this heading — a benchmark, not a quote.
For the origins carrying the most volume, the per-country breakdowns go a level deeper: Taiwan (7318.14.10), China (7318.15.20) and Japan (7318.16.00). To price a specific shipment, put your 10-digit code and country of origin into the tariff simulator.
What this means for your next shipment
The practical sequence is: confirm the 10-digit line against the actual goods, confirm origin under the substantial-transformation rules rather than the shipping address, then price the duty on that pair. Airlift USA moves the cargo and coordinates classification and entry filing through our licensed broker network, so the code agreed at booking is the one on the entry.
For the operational side rather than the tariff side, see the Steel Logistics guide for how this cargo moves, the China to USA lane for transit times and ports and the heading index to compare against the rest of chapter 73.
Price a shipment under HTS 7318
Airlift USA has moved ocean and air freight into the United States since 1999 and coordinates HTS classification, ISF and entry filing through our licensed broker network.
Methodology
Figures come from the U.S. Census Bureau's international trade statistics for imports for consumption — the customs value of goods entered into US commerce, not shipments in transit or goods held in bonded warehouses. The period is March–July 2026 (5 months of data), and coverage is limited to 55 major origin countries, so totals here are lower than published US-wide totals for the same heading.
Three quantities are additive and everything else is derived from them: entered customs value, dutiable value and calculated duty. Effective duty is calculated duty divided by dutiable value — the rate CBP actually applied to the part of the trade that was dutiable. Dutiable share is dutiable value divided by entered value; below 20% it means the trade entered mostly free, under a trade agreement or a duty-free provision. Duty per $100 spreads calculated duty across all entered value, which is the figure comparable between origins.
Chapter 98 and chapter 99 are excluded: those are special classification and temporary-measure provisions rather than product headings. Heading and tariff-line descriptions are the current HTS text. Values are historical and reflect duty as calculated at the time of entry; they are not a quote and not a prediction of the rate on a future shipment.
Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value. Census data is a work of the US government and is in the public domain.
Frequently asked questions
Which countries export the most screws, bolts, nuts, coach screws, screw hooks, rivets to the United States?
Taiwan is the largest origin under HTS heading 7318, with $704 million entered between March and July 2026, or 29.9% of the heading. China follows at 15.9% and Japan at 10.3%. Figures cover the 55 major origin countries in this dataset. Source: U.S. Census Bureau, USA Trade Online / International Trade API, imports for consumption, March–July 2026; effective duty = calculated duty ÷ dutiable value.
How much import duty is paid on screws, bolts, nuts, coach screws, screw hooks, rivets under HTS 7318?
Across all origins, 96.4% of the entered value was dutiable and CBP calculated $1.19 billion of duty over the five months — an effective 52.3% on dutiable value, or about $50.46 per $100 of goods across the whole heading. Your own rate depends on the exact 10-digit line and country of origin.
Which HTS codes fall under heading 7318?
Heading 7318 covers screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel. 48 ten-digit lines recorded imports in this period; the largest by value were 7318.16.00.85, 7318.14.10.60, 7318.29.00.00 and 7318.15.20.95. Duty rates differ between those lines, so the 10-digit classification matters more than the heading.
Which origin pays the lowest duty on screws, bolts, nuts, coach screws, screw hooks, rivets?
Among origins with at least 2% of the heading, Canada paid the least duty relative to entered value — about $25.31 per $100 of goods, with 29.7% of its value entering free. Duty is only one part of landed cost, and a claim has to be substantiated at entry to be allowed.
How do I check the duty on my own shipment?
Use the Airlift USA tariff simulator with your 10-digit HTS code and country of origin to see the duty stack that applies today, then confirm the classification before you file. Airlift USA coordinates classification and entry filing through our licensed broker network and can review the code against your product specification.