Bonnel Type Wire Springs for Box Springs
Hourglass-shaped Bonnel helical springs from wire under 5.1 mm diameter, used in box spring mattress foundations of heading 9404. They deliver firm foundational support beneath foam layers. HTS 7320.20.50.10 applies for their precise mattress support role.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made from strip, not wire
Leaf-type or flat strip springs for mattresses classify under coil subheading 7320.10.
If non-wire helical construction
Helical springs not of wire (e.g., rod-formed) for mattresses go to 'other' non-wire category.
If for industrial compressors
Same size helical springs in machinery like air compressors shift to Chapter 84.
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Import Tips & Compliance
• Use gauge measurement certificates for wire diameter to prevent misclassification to coarser spring categories
• Declare as 'mattress support springs only' on invoices; avoid generic 'coil springs' descriptions
Related Products under HTS 7320.20.50.10
Wire Helical Mattress Support Springs
These helical springs are made from steel wire with a cross-sectional dimension less than 5.1 mm, specifically designed for use in mattress supports and innerspring mattresses under heading 9404. They provide essential bounce and support in bedding systems. Classified under HTS 7320.20.5010 due to their wire size and mattress-specific application.
Innerspring Unit Coil Springs for Mattresses
Small-diameter helical wire springs (<5.1 mm cross-section) formed into innerspring units for queen-size mattresses per heading 9404. They offer zoned support for comfort sleeping. Fits HTS 7320.20.50.10 as wire helical springs dedicated to mattress construction.
Pocketed Coil Encased Mattress Springs
Individually fabric-encased helical wire springs (<5.1 mm cross-section) for independent pocketed mattress coils in 9404 products. They minimize motion transfer for couples. Classified in HTS 7320.20.50.10 despite encasement, as core spring remains qualifying wire helical type.
Continuous Wire Formed Mattress Edge Springs
Helical edge support springs machine-formed from continuous steel wire under 5.1 mm, reinforcing mattress perimeter in 9404 beds. They prevent sagging at borders. Meets HTS 7320.20.50.10 for wire helical springs tailored to mattress supports.
Zoned Support Helical Springs for Orthopedic Mattresses
Variable pitch helical wire springs (<5.1 mm diameter) zoned for lumbar/firmness support in therapeutic 9404 mattresses. They conform to body pressure points. HTS 7320.20.50.10 covers these specialized mattress wire springs.
Mini-Coil Micro Springs for Foam Hybrid Mattresses
Ultra-fine helical micro-springs from wire <5.1 mm integrated into hybrid foam mattresses of heading 9404 for added resilience. They enhance foam durability without bulk. Fits HTS 7320.20.50.10 as qualifying wire helical mattress components.