Duty Rate (from China)
Subheadings
Products classified under Tariff item 7320.90.00
Anti-Shock Breguet Hairspring
A specialized hairspring for mechanical watch movements, made from steel wire and featuring a Breguet terminal curve for improved isochronism. It is designed to regulate the oscillation of the balance wheel, ensuring accurate timekeeping. This product falls under tariff item 7320.90.00 as an 'other' spring of iron or steel, not being a leaf spring or a clock or watch spring of heading 91.14.
Belleville Disc Spring
A conical disc-shaped steel spring that stacks for high load capacity, used in bolted joints and safety valves. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product is classified under tariff item 7320.90.00 as an 'other' spring.
Bowed V-Spring Washer
A V-profile steel washer spring providing light axial force in assemblies. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product falls under tariff item 7320.90.00 as an 'other' spring.
Brelet Breguet Overcoil Hairspring
A premium Breguet-style overcoil hairspring for chronometer-grade watches, crafted from high-elasticity steel to minimize isochronism errors. It is a specialized spring used in mechanical timepieces to regulate balance wheel oscillation. This product is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Cantilever Spring Arm
A single-arm steel spring deflecting under load for parking brakes and levers. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product is classified under tariff item 7320.90.00 as an 'other' spring.
Carbon Steel Extension Spring
A wire-formed extension spring made of carbon steel, featuring loops at each end for tensile applications in tools and appliances. It is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel, distinct from leaf springs or vehicle-specific springs.
Clock Spring for Steering Columns
A flat spiral steel spring wound in a clock-like coil for storing rotational energy in turn signal mechanisms. It is a spring of iron or steel, not being a clock or watch spring of heading 91.14. This product falls under tariff item 7320.90.00 as an 'other' spring.
Clockwise Torsion Spring
A right-hand wound torsion spring used for counterbalancing applications, such as in doors or lids. It is classified under 7320.90.00 as an 'other' spring, excluding actual clock or watch springs.
Conical Compression Wire Spring
A tapered conical compression spring made from steel wire, designed for progressive loading in shock absorbers. It falls under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Constant Force Spring Reel
A pre-stressed steel strip wound into a reel that exerts uniform force over extension, used in retractable cords and tape measures. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product is classified under tariff item 7320.90.00 as an 'other' spring.
Continuous Wire Coil Springs for Mattresses
A single continuous strand of steel wire formed into helical coils for innerspring mattress cores. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, meeting Chapter 73 wire dimension limits and specifically engineered for mattress support.
Die Spring for Presses
A heavy-duty rectangular or round steel spring used in die sets for stamping presses to cushion impact. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product falls under tariff item 7320.90.00 as an 'other' spring.
Double Torsion Wire Spring
A dual-leg torsion spring made from music wire, used in battery contacts and clamps. It is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Galvanized Steel Coil Wave Spring
A wave-formed coil spring made from galvanized steel wire, providing compact axial load in bearings and pumps. It falls under 7320.90.00 as an 'other' wire spring, with corrosion resistance for harsh environments.
Garolite Compression Spring
A cylindrical steel pin with an axial slot that compresses for press-fit insertion, functioning as a spring pin in assemblies. It is a spring of iron or steel, not being a leaf spring or a clock/watch spring. This product falls under tariff item 7320.90.00 as an 'other' spring.
Glucydur Hairspring for ETA Movements
A Glucydur Nivaflex hairspring optimized for ETA 2824 and 2892 automatic watch calibers, providing temperature-stable oscillations. It is a precision spring made from a steel alloy, designed for horological applications. This product falls under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Hairpin Clip Spring
A U-shaped steel wire spring designed for quick-release clips in electronics and automotive trim. It provides tension to hold components securely and is classified as an 'other' spring of iron or steel under tariff item 7320.90.00.
Hairpin Tension Spring
A hairpin-style wire spring used for gates and tarps, providing tension. It is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Heliocoil Wire Springs for Mattress Innersprings
Small-diameter hourglass-shaped wire springs interlocked for high-density mattress support systems. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, fabricated from steel wire per Chapter 73 parameters.
Incabloc Shockproof Hairspring
An Incabloc system hairspring with integrated shock protection for luxury mechanical watch movements, made from tempered steel wire. It is a specialized spring designed to absorb shocks and maintain accurate timekeeping. This product is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Independent Wire Suspension Springs for Mattresses
Freestanding wire springs with encased suspension for minimal motion transfer in luxury mattresses. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, composed of Chapter 73-defined wire and purposed exclusively for mattress innerspring systems.
Music Wire Extension Spring
An extension spring made from high-carbon music wire, featuring loops at both ends for attachment and providing force when stretched. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, distinct from compression springs.
Music Wire Torsion Spring
A high-carbon music wire torsion spring for rotational force resistance, used in clothespins and automotive hinges. It is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Negator Spring Strip
A pre-coiled flat steel strip spring that provides constant tension retrieval in seat belts and lanyards. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, as it is not a helical or leaf spring.
Nested Die Spring Set
A set of stackable rectangular wire springs for heavy press dies, sold as a matched set. Each individual spring is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Nivachron Hairspring for Rolex Movements
A Nivachron chronergy hairspring with optimized leg design for Rolex Caliber 3235, offering antimagnetic properties from a steel base. It is a precision spring for mechanical watch movements, regulating balance wheel oscillation. This product falls under tariff item 7320.90.00 as an 'other' spring of iron or steel.
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 is made from a steel-based alloy and is a specialized spring for horology. This product is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Offset Wire Springs for Mattress Foundations
Wire springs with offset coils providing zoned support in mattress foundations. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, with steel wire construction adhering to Chapter 73 cross-section definitions.
Phosphor Bronze Equivalent Steel Wire Spring
A steel wire spring mimicking phosphor bronze properties for electrical contacts, used in switches and relays. It is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm.
Pocketed Coil Springs for Box Springs
Individual steel wire coils encased in fabric pockets, assembled into units for box spring mattress foundations. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, with wire conforming to Chapter 73 definitions.
Precision Flat Hairspring for Pocket Watches
A flat spiral hairspring for antique-style pocket watch restoration, made from blued steel wire for visual appeal and function. It is a specialized spring for regulating timekeeping in mechanical watches. This product falls under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Precision Steel Die Spring
A heavy-duty rectangular wire die spring for stamping presses, color-coded by load rate. It is classified under 7320.90.00 as an 'other' wire spring, with wire diameter not exceeding 16 mm, and is used in manufacturing dies.
Silicon-Coated Steel Hairspring
A steel hairspring with silicon coating for anti-magnetic properties in modern mechanical watches, maintaining traditional spiral form. The base material is iron or steel wire, and the coating does not change its essential character as a spring. This product is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Snap Spring Ring
A circlip-type steel spring ring that snaps into grooves for shaft retention. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, serving as a retaining spring.
Stainless Steel Compression Spring
A helical spring made from stainless steel wire, designed to resist compression forces and return to its original shape. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, not specified elsewhere.
Steel Torsion Spring for Clamps
A torsion spring made of steel wire that provides rotational force, commonly used in binder clips and hose clamps. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, as it is not a helical or leaf spring.
Steel Wire Edge Support Springs for Mattresses
Heavy-gauge wire springs forming perimeter border wires in mattress assemblies. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, designed to reinforce edges of innerspring units while meeting Chapter 73 wire cross-section limits.
Volute Spring for Shock Absorbers
A conical spiral steel spring that compresses progressively, applied in shock absorbers and recoil systems. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, beyond basic helical types.
Wave Spring Washer
A flat steel spring washer with undulating waves providing axial load in tight spaces, used in bearings and valves. It is classified as an 'other' spring of iron or steel under tariff item 7320.90.00, as it is not a helical or leaf spring.
Wire Bonnell Springs for Mattresses
Helical wire springs formed into interconnected units used as the core support in innerspring mattresses. They are classified as 'other' springs of iron or steel under tariff item 7320.90.00, made from steel wire no thicker than 16 mm and specifically designed for mattress innersprings.