Internal Star Lock Washer #10
A stainless steel washer with inward-facing teeth that bite into softer materials for secure locking against rotation, common in electronics and aerospace. Its non-threaded design places it under this tariff item as a spring lock washer.
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 lacks spring action
Non-spring toothed washers are classified as other washers.
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
• Verify the washer is made of stainless steel and has spring properties
• Provide technical drawings showing the tooth design for customs
• Check if the washers are for aerospace use, which may require additional documentation
Related Products under Tariff item 7318.21.00
1/4 Inch Zinc Plated Spring Lock Washer
A carbon steel split ring washer with zinc plating, designed to provide axial flex and prevent fastener loosening under vibration. Its non-threaded helical split design classifies it as a spring lock washer of iron or steel.
Anti-Vibration Curved Spring Washer
A multi-curved steel washer that absorbs vibration through controlled deflection, providing locking action in automotive and engine applications. Its non-threaded spring design places it under this tariff item as a spring lock washer.
Belleville Disc Spring Washer 20mm OD
A conical steel disc washer that flattens under load to maintain tension and absorb shock, used in high-pressure flange applications. Its elastic deformation qualifies it as a spring lock washer under this tariff item.
Cryogenic Stainless Lock Washer
An AISI 316 stainless steel spring washer tested for cryogenic service in LNG applications, providing locking in extreme low-temperature environments. Its non-threaded spring design classifies it under this tariff item.
DIN 127 Spring Lock Washer Type B
A heavy-duty rectangular steel washer per DIN 127 Type B standard, designed for high preload applications in European machinery. Its non-threaded spring lock design places it under this tariff item.
Finger Spring Washer Assortment Pack
A set of steel washers with radial fingers that deflect to lock fasteners, assorted sizes for maintenance and MRO applications. Packaged for retail but classified as non-threaded spring lock washers under this tariff item.