Watch Balance Spring
Precision helical hairspring of steel wire under 5.1 mm for mechanical watch balance wheels. HTS 7320.20.5020 for small wire helical springs. Regulates timekeeping oscillation.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If clock/watch parts
Watch-specific parts under Chapter 91 timepieces.
If precious metal alloys
High-end watches use gold/silver alloy springs.
If electrical transformers inductors
If used in quartz watch electronics.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Swiss origin common; preferential treatment possible
• Highly precise measurement required
• Complete movements classified differently
Related Products under HTS 7320.20.50.20
Small Automotive Battery Terminal Helical Spring
Helical compression spring of steel wire <5.1 mm diameter for battery clamp terminals in vehicles. Fits HTS 7320.20.5020 as other small-wire helical springs of iron/steel. Provides tension for secure electrical connections.
Double Torsion Helical Spring for Pens
Small double-loop torsion spring of steel wire <5.1 mm for ballpoint pen mechanisms. HTS 7320.20.5020 covers such other helical wire springs under the size limit. Enables click-action retraction.
Guitar Fretboard Adjustment Helical Spring
Helical spring of steel wire under 5.1 mm diameter for truss rod adjustment in electric guitars. Classified HTS 7320.20.5020 as other small wire helical springs. Maintains neck curvature tension.
Toy Mechanism Compression Spring
Small compression helical spring from steel wire <5.1 mm for wind-up toy actions. HTS 7320.20.5020 for other helical wire springs of this size. Powers simple mechanical movements.
Valve Return Helical Spring
Steel wire helical spring <5.1 mm diameter for returning solenoid valves to rest position. Under HTS 7320.20.5020 as other small helical springs. Used in industrial controls.
Clip-On Sunglasses Hinge Spring
Miniature torsion helical spring of steel wire under 5.1 mm for clip-on sunglass flip hinges. HTS 7320.20.5020 covers such small wire helical springs. Provides snap-action retention.