Heat-Treated River Flint Shingle
Durable flint pebbles heat-treated for improved weathering resistance, used in concrete aggregates and road metalling. The thermal processing enhances bonding properties without altering basic classification. Covered by HTS 2517.10.00.15 including heat-treated shingle and flint.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If natural silica sand rather than coarse flint pebbles
Silica in sand form (<2mm) classifies under natural sands; coarse flint remains pebbles.
If further processed into polished decorative panels
Advanced fabrication moves flint from raw Chapter 25 to worked stone articles.
If flint granules/powder from Heading 2515/16 after crushing
Processed flint powder classifies as granules under later subheading.
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Import Tips & Compliance
• Document heat treatment temperature/time to prove doesn't constitute 'worked' processing under chapter notes
• Flint's high silica content requires proper dust control certification for handling
• Distinguish from decorative fire pit flint by specifying construction aggregate end use
Related Products under HTS 2517.10.00.15
River Washed Pea Gravel
Smooth, rounded pebbles typically 3/8 inch in diameter, sourced from riverbeds and washed for cleanliness. Commonly used as concrete aggregate in residential driveways and decorative landscaping mulch. Falls under HTS 2517.10.00.15 as pebbles and gravel for concrete aggregates or road ballast.
3/4 Inch Crushed Limestone Gravel
Angular crushed limestone gravel sized 3/4 inch, ideal for road base and concrete mixing. Provides excellent compaction for driveways and parking lots. Classified under HTS 2517.10.00.15 for gravel used in concrete aggregates and road metalling.
Railway Ballast Granite Gravel
Hard, angular 1.5-2 inch granite gravel specifically sized for railway track underlayment. Provides superior drainage and stability for heavy rail traffic. HTS 2517.10.00.15 covers gravel used for railway ballast per heading description.
Concrete Ready-Mix Aggregate Gravel
Pre-washed 57 stone gravel blend (3/4-1 inch) specifically graded for ready-mix concrete production. Meets ASTM C33 Size No. 57 specifications for optimal workability and strength. HTS 2517.10.00.15 for pebbles/gravel commonly used for concrete aggregates.
Road Base Crusher Run Gravel
Mixture of crushed stone and stone dust (0-1.5 inch) used as road sub-base material. Provides excellent compaction and load-bearing capacity for highways. Classifies under HTS 2517.10.00.15 for gravel used in road metalling.
Decorative 1-2 Inch River Rock
Smooth, rounded 1-2 inch river rocks primarily used around landscaping features despite natural concrete aggregate properties. Commonly applied in dry creek beds and ground cover. HTS 2517.10.00.15 covers pebbles regardless of decorative application if suitable for construction use.