M12 Dome Spring Washer
A cylindrical steel spring washer that compresses into a dome shape under load for high axial loading, applied in heavy equipment and bridge construction. This non-threaded lock washer provides spring action for secure fastening.
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 washer is used as a spring rather than a lock washer
Springs of iron or steel are classified under heading 7320.
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
• Document the spring function and load-bearing capacity of the washer
• Ensure the steel composition is clearly stated for customs classification
• Verify if the product meets Canadian construction standards for bridge applications
Related Products under Tariff item 7318.21.00
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A 1/4 inch helical spring lock washer made from alloy steel, designed for use with SAE bolts in automotive applications. Its split helical design provides axial flexibility and locking tension to resist vibration-induced loosening. This non-threaded article is classified under tariff item 7318.21.00 as a spring washer of iron or steel.
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17-7PH Stainless Dome-Ended Lock Washer 1/2 Inch
A 1/2 inch precipitation-hardened stainless steel dome-ended lock washer for high-vibration locking applications, particularly in aerospace. The dome shape provides a spring action that maintains tension on the fastener. This non-threaded lock washer is classified under tariff item 7318.21.00 as an 'other' lock washer.
3/8 Inch Spring Lock Washer Pack
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5/16 Inch Alloy Steel Helical Spring Lock Washer
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