Boat Trailer Winch Spring
Spiral helical torsion spring of 6.8 mm wire for constant force in boat trailer winches. Meets HTS 7320.20.50.45 helical wire spring criteria. Corrosion-resistant coating for marine environment.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If parts of trailers
Trailer-specific springs classify under vehicle/trailer parts.
If outside specified wire dimensions
Different wire sizes have separate helical spring provisions.
If parts of winches/pulleys
Winch components including springs may classify under material handling machinery.
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Import Tips & Compliance
• Salt spray testing (ASTM B117) certification for 1000+ hours required
• Specify constant force vs. variable rate to confirm helical classification
• Individual packaging prevents set classification with winch assembly
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