Pure Copper Constant Force Springs
Spiral-wound pure electrolytic copper constant force springs for retractable cords and battery contacts, classified under HTS 7419.80.1600. Provides uniform tension in compact spaces.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If insulated copper wire for ignition systems
Wound copper conductors for ignition wiring classify under Chapter 85 insulated wire.
If parts of transformers
Power supply copper spring contacts go with electrical transformers in 8504.
If copper wire under 6mm before spooling into springs
Copper rod/wire of high conductivity is 7408 until fabricated into spring articles.
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Import Tips & Compliance
• Confirm copper purity >99% via assay certificates for Chapter 74 entry
• Watch for oxidation; import in nitrogen-sealed packaging
• Distinguish from wire by spring function on entry documents
Related Products under HTS 7419.80.16.00
Stainless Steel Compression Springs with Copper Coating
These are helical compression springs primarily made from copper-plated stainless steel wire, functioning as copper springs under HTS 7419.80.1600 due to their copper composition and spring form. They are used in automotive suspensions and industrial machinery for shock absorption.
Phosphor Bronze Coil Springs
Phosphor bronze (copper-tin alloy) coil springs designed for electrical contacts and precision instruments, classified under HTS 7419.80.1600 as other copper spring articles. Their high corrosion resistance makes them ideal for marine and electronic applications.
Brass Extension Springs
Brass (copper-zinc alloy) extension springs with hooks, used in garage doors and trampolines, falling under HTS 7419.80.1600 for copper springs. Meets subheading note (a) with zinc predominant over other elements.
Copper Beryllium Torsion Springs
High-strength copper-beryllium alloy torsion springs for aerospace and medical devices, classified as copper springs under HTS 7419.80.1600. Their fatigue resistance suits high-stress applications.
Nickel Silver Flat Leaf Springs
Copper-nickel-zinc (nickel silver) flat leaf springs per subheading note (c), used in clocks and eyewear hinges, under HTS 7419.80.1600 as copper springs with ≥5% nickel.
Brass Clockwork Mainspring
Brass copper-zinc mainsprings for mechanical watches and clocks, HTS 7419.80.1600 as copper springs. High elasticity essential for timepiece power delivery.