Belleville Disc Spring
A conical disc-shaped steel spring that stacks for high load capacity, used in bolted joints and safety valves. It falls under tariff item 7320.90.00 as an 'other' spring of iron or steel, not elsewhere specified.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | +50.0% | 50% |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
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 the product is imported as a plain washer rather than a spring
Section Note 2(a) includes articles of heading 73.18 as parts of general use.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the product is a spring, not a washer of heading 7318
• Provide the steel grade and dimensions for classification
• Be aware that disc springs may be subject to anti-dumping measures if sourced from certain countries
Related Products under Tariff item 7320.90.00
Anti-Shock Breguet Hairspring
A specialized hairspring for mechanical watch movements, featuring a Breguet terminal curve and anti-shock mounting pins. Constructed from steel wire, it regulates the oscillation of the balance wheel for precise timekeeping, falling under tariff item 7320.90.00 as an 'other' spring of iron or steel.
Bowed V-Spring Washer
A V-profile steel washer spring providing light axial force in assemblies. It is classified under tariff item 7320.90.00 as an 'other' spring of iron or steel, distinct from flat washers.
Brelet Breguet Overcoil Hairspring
A Breguet-style overcoil hairspring for chronometer-grade watches, made from high-elasticity steel to minimize isochronism errors. This steel wire spring is designed for precise timekeeping and falls 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 falls under tariff item 7320.90.00 as an 'other' spring of iron or steel, not being a leaf spring.
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 classified under tariff item 7320.90.00 as an 'other' spring of iron or steel, not being a clock or watch spring.
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 falls under tariff item 7320.90.00 as an 'other' spring of iron or steel.