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.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If specifically clock/watch parts
All clock/watch parts including springs classify together in Chapter 91.
If chain articles rather than springs
Copper chain and parts are separate from spring articles.
If assembled into handbags with frames
Springs in structured handbags classify as travel goods under Chapter 42.
Not sure which classification is right?
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Import Tips & Compliance
• Specify 'mainspring' function; avoid 'wire' description to prevent 7408 classification
• Provide end-use statements for watch assembly to support valuation
• Anti-dumping scrutiny applies to certain clock springs from Asia
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.
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.