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U.S. imports of threaded screws and bolts (nesoi) of iron or steel (HS 731815) totaled $210.3M in July 2026, traded with 76 countries.
Importers of Threaded Screws and Bolts (NESOI) of Iron or Steel paid $114.5M in duties in July 2026 — an effective duty rate of 57% on $202.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataThreaded screws and bolts not elsewhere specified — including structural bolts, track bolts, anchor bolts, hex-head cap screws, socket screws, machine screws, and studs — form one of the most granularly subdivided headings in the iron and steel fastener schedule, with more than two dozen 10-digit tariff lines distinguishing head style, thread diameter, and alloy content. Taiwan and China are the leading US suppliers, with South Korea, Japan, and Germany also significant sources. Structural bolts and continuously threaded rod studs are particularly important inputs for the construction and infrastructure sectors, and Chinese-origin goods in this heading are broadly subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
23.4K shipments/mo
Structural bolts (7318152030) are specifically designed for use in steel construction connections and typically conform to recognized structural standards (such as ASTM F3125). They are distinguished from track bolts (7318152020), anchor bolts (7318152041), and general hex-head bolts (7318152065) by their intended load-bearing application and specification compliance. Misclassifying a structural bolt as a general hex bolt — or vice versa — can result in an incorrect duty rate, so verifying the applicable ASTM or equivalent standard is advisable.
Standard studs of iron or steel fall under 7318155090 (or 7318155030 for stainless), while continuously threaded rod — threaded along its entire length rather than at the ends only — is separately classified under 7318155051 (alloy steel) or 7318155056 (iron/non-alloy steel). The distinction matters because continuously threaded rod is a commodity construction product with different pricing and trade-remedy exposure than precision-machined studs.
HSChapter 73
Subheading 1 of 12 in heading 7318
Subheading 731815 · $210.3M of $472.6M
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ImportsExports
Imports
$210.3MYoY · Pro
Exports
$236.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7318159000 | Threaded Fasteners NESOI of Iron or Steel | $116.1M |
| 7318152000 | Bolts W/Wo Their Nuts O Wshrs, Of Iron or Steel | $97.3M |
| 7318155000 | Studs of Iron or Steel, Threaded | $22.8M |
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.
Imports · July 2026
origin
customs district
destination
entry
rate provision · imports
1.6% enters free of duty; the effective duty rate is 54.47%.