Hairsprings
Springs and leaves for springs, of iron or steel: > Other: > Hairsprings
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 7320.90.10.00
Nivarox Hairspring for Mechanical Watches
A Nivarox alloy hairspring designed for high-precision mechanical watches, regulating the oscillation of the balance wheel to ensure accurate timekeeping. It falls under HTS 7320.90.1000 as a hairspring made of iron or steel wire with cross-section under 16mm, specifically for horological use.
Incabloc Shockproof Hairspring
An Incabloc system hairspring with integrated shock protection for luxury mechanical watch movements, made from tempered steel wire. Classified under HTS 7320.90.1000 due to its specific role as a hairspring in horology, derived from iron/steel wire.
Brelet Breguet Overcoil Hairspring
Premium Breguet-style overcoil hairspring for chronometer-grade watches, crafted from high-elasticity steel to minimize isochronism errors. It qualifies for HTS 7320.90.1000 as a specialized hairspring of steel wire for precise time regulation in horology.
Glucydur Hairspring for ETA Movements
Glucydur Nivaflex hairspring optimized for ETA 2824 and 2892 automatic watch calibers, providing temperature-stable oscillations. Falls under HTS 7320.90.1000 as iron/steel hairspring specifically engineered for watch balance wheel regulation.
Silicon-Coated Steel Hairspring
Steel hairspring with silicon coating for anti-magnetic properties in modern mechanical watches, maintaining traditional spiral form. Classified in HTS 7320.90.1000 as base material is iron/steel wire hairspring, coating considered secondary treatment.
Precision Flat Hairspring for Pocket Watches
Flat spiral hairspring for antique-style pocket watch restoration, made from blued steel wire for visual appeal and function. HTS 7320.90.1000 applies to all hairsprings of iron/steel regardless of watch type, as horological regulating springs.
Anti-Shock Breguet Hairspring
Breguet terminal curve hairspring with KIF anti-shock mounting pins for robust mechanical chronographs. Meets HTS 7320.90.1000 criteria as specialized steel wire hairspring for timepiece oscillation control.
Nivachron Hairspring for Rolex Movements
Nivachron chronergy hairspring with optimized leg design for Rolex Caliber 3235, offering Parachrom-like antimagnetic properties from steel base. Classified under HTS 7320.90.1000 as hairspring of steel for mechanical watch regulation.