Wave Spring Washer 25mm ID
Pre-tempered steel washer with multiple wave undulations providing spring force in tight spaces. Classified HTS 7318.21.00 as a non-threaded lock washer with spring properties. Used in automotive transmissions and pumps.
Import Duty Rates by Country of Origin
More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If part of thrust bearings
Bearing components take Chapter 84 precedence.
If automotive transmission specific
Vehicle parts classification for OEM assemblies.
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Import Tips & Compliance
• Supply spring rate calculations to prove functional spring characteristics
• Separate from bearing sets; declare as individual washers
• Note heat treatment specs for tariff value accuracy
Related Products under HTS 7318.21.00
M6 Stainless Steel Split Lock Washer
A helical split ring washer made from AISI 304 stainless steel, designed to compress under bolt tension for locking action. It falls under HTS 7318.21.00 as a non-threaded spring washer of steel that prevents fastener loosening due to vibration. Commonly used in automotive and machinery assembly.
1/4 Inch Zinc Plated Spring Lock Washer
A carbon steel washer with zinc plating for corrosion resistance, featuring a split ring that provides axial flex for vibration resistance. Classified under HTS 7318.21.00 as a non-threaded lock washer of iron or steel. Ideal for construction and electrical panel fastening.
Belleville Disc Spring Washer 20mm OD
A conical steel disc washer that flattens under load to maintain tension and absorb shock. It qualifies under HTS 7318.21.00 as a spring lock washer due to its elastic deformation properties. Used in high-pressure flange and valve applications.
M10 External Tooth Lock Washer
Steel washer with radially stamped teeth that bite into mating surfaces for locking. Non-threaded design places it under HTS 7318.21.00 as a spring lock washer. Prevents rotation in electrical and appliance assemblies.
Internal Star Lock Washer #10
Stainless steel washer with inward-facing teeth for secure locking against rotation on softer materials. Falls under HTS 7318.21.00 as a non-threaded steel spring lock washer. Common in electronics and aerospace fasteners.
M12 Dome Spring Washer
Cylindrical steel spring washer that compresses into dome shape under load for high axial loading. HTS 7318.21.00 covers this non-threaded steel lock washer design. Applied in heavy equipment and bridge construction.