Music Wire Extension Helical Spring
Precision extension spring from high-carbon music wire under 5.1 mm diameter, used in garage door mechanisms. Classified in HTS 7320.20.5020 for helical springs of steel wire with small cross-section, not leaves or coil types. Ideal for tension applications in hardware.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If suitable for electricity transmission
Helical springs designed for electrical contacts use different statistical suffix.
If for furniture or hardware sets
Springs in base metal mountings for furniture classified as hardware accessories.
If made into screw hooks with integrated spring
Articles like spring-loaded screw hooks classified under headed pins/studs.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Label with exact wire gauge and material grade; music wire is high-tensile steel
• Ensure no pre-assembly with other parts to prevent set classification
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