Music Wire Helical Torsion Spring
Note: This is a close-wound helical spring exerting torque, made from high-carbon music wire for precision applications like clamps and hinges. It is under HTS 7320.20.50 as 'other' helical springs, distinct from dedicated torsion springs in statistical notes.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in the form of wire rather than finished spring
Unworked or semi-finished wire products over 16mm are not 'springs' but under Chapter 73 wire headings.
If part of transmission machinery
Helical springs for gearboxes or drives are classified as parts of machinery in Chapter 84.
If for hand tools like pliers
Springs designed as integral parts of tools fall under Chapter 82 tool headings.
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Import Tips & Compliance
• Use technical specs to differentiate from pure torsion springs; helical form dictates 7320.20
• Ensure invoices specify 'helical' to avoid confusion with flat torsion bars
• Comply with steel import quotas if applicable to high-carbon wire products
Related Products under HTS 7320.20.50
Stainless Steel Compression Helical Spring
A helical spring made of stainless steel designed to compress under load and return to its original shape, commonly used in automotive suspensions and industrial machinery. It falls under HTS 7320.20.50 as a helical spring of iron or steel that is neither a coil spring suitable for automobile suspension nor a torsion spring.
Carbon Steel Extension Helical Spring
A helical spring from carbon steel that extends when pulled and contracts to store energy, used in door closers and garage door mechanisms. Classified under HTS 7320.20.50 as an 'other' helical spring of iron or steel, excluding automotive or torsion types.
Galvanized Steel Helical Springs for Fencing
Helical springs of galvanized steel used in tension wire fencing gates and farm equipment to absorb shock. Falls under HTS 7320.20.50 as other helical springs of iron or steel, not for automotive use.
Alloy Steel Helical Springs for Appliances
Precision helical springs from alloy steel used in washing machines, dryers, and refrigerators for vibration damping. Classified in HTS 7320.20.50 as other helical springs excluding automotive suspension.
High-Carbon Steel Helical Die Springs
Heavy-duty helical compression springs made from high-carbon steel for industrial stamping dies and presses. Under HTS 7320.20.50 as other helical springs of iron or steel for manufacturing equipment.
Zinc-Plated Helical Springs for Toys
Small helical springs with zinc plating used in toy mechanisms like wind-up cars and jack-in-the-boxes. Fits HTS 7320.20.50 for other iron or steel helical springs, suitable for consumer goods.