U.S. imports of Screw Hooks and Screw Rings of Iron or Steel (HS 731813) totaled $1.5M in August 2026, imported from 23 countries.
Importers of Screw Hooks and Screw Rings of Iron or Steel paid $876K in duties in August 2026, an average duty rate of 59.35% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Screw Hooks and Screw Rings of Iron or Steel imports of $1.5M in August 2026 ran 29% above the year-to-date monthly average of $1.1M.
Last updated: August 2026 dataScrew hooks and screw rings — threaded fasteners with a hook or closed-ring terminus used in hanging, rigging, and hardware applications — are subdivided in the US schedule by thread diameter: under 6 mm (7318130030) and 6 mm or greater (7318130060). China is the dominant supplier, with South Korea and Vietnam also present in the import mix. The thread diameter breakpoint is a hard classification boundary, so importers should measure thread diameter precisely and document it in entry records to avoid reclassification at the port.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
151 import shipments a month
The 6 mm threshold refers to the nominal thread diameter of the screw shank — the threaded portion that is driven into the substrate — not the diameter of the hook or ring opening. Standard thread gauges or calipers applied to the shank are the appropriate measurement tools. Importers should include thread diameter specifications on commercial invoices to facilitate accurate classification and reduce the risk of CBP queries.
Yes. The heading explicitly covers both screw hooks (open terminus) and screw rings (closed terminus, commonly called screw eyes or eye screws). Both forms share the same 10-digit lines differentiated only by thread diameter. The distinction between an open hook and a closed ring does not create a separate tariff line under the current US schedule.
Subheading 11 of 12 in heading 7318
Subheading 731813 · $1.5M of $473.8M
ImportsExports
Imports
$1.5MYoY · free account
Exports
$709KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $14.2M of Screw Hooks and Screw Rings of Iron or Steel and exported $6.8M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 731813 — Screw Hooks and Screw Rings of Iron or Steel, so the companies trading it can find you. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 7318130060 | Screw Hooks and Rings Ios Thread Diam 6mm or More | $1.2M | 59.70% | 99.35% | $736K |
| 7318130030 | Screw Hooks or Rings Ios Thread Diam Ls Thn 6mm | $243K | 57.53% | 100.00% | $140K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7318130000 | Screw Hooks and Screw Rings of Iron or Steel | $709K |
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 · August 2026
origin
South Korea and China together supply 69% of it. China pays 80.4% duty; United Kingdom 32.3%.
customs district
destination
entry
rate provision · imports
0.6% enters free of duty; duty collected equals 59.35% of imports for consumption.