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.
Import Duty Rates by Country of Origin
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 in the form of headed clevis pins with washers
Clevis pins with integrated washers fall under pins subheading.
If a plain non-locking washer
Non-spring, non-locking steel washers use the other non-threaded washers code.
If for use in specific steel structures
Parts of structures may apply if proven for building assembly rather than general use.
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Import Tips & Compliance
• Ensure plating thickness specs in invoices to distinguish from plain steel and comply with anti-dumping rules
• Use HTS statistical suffixes if available for precise reporting of size and plating type
• Avoid bundling with screws/bolts; declare as separate non-threaded articles to prevent reclassification
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.
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.
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.
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.