6N Single Crystal Copper Wire (OCC) — Solid 0.01–3mm
6N Single Crystal Copper Wire (OCC) — Solid, 0.01–3mm
6N single crystal copper wire (OCC) is certified 99.9999% (6N) pure bare solid copper wire produced by the Ohno Continuous Casting process, which draws each conductor as one continuous single-crystal structure with almost no grain boundaries along its length. The result is a smooth, ultra-high-purity mono-crystal OCC wire valued for clean signal transfer, high conductivity, and a soft, easy-to-work feel — the preferred conductor wire for HiFi audio cables, headphone upgrade cables, precision winding, and research use across the United States.
6N Single Crystal Copper Wire Size Ranges
Fine 6N OCC Wire (0.01–0.1mm)
Ultra-fine solid 6N single crystal copper wire for IEM and earphone cables, tiny signal conductors, micro coils, instrument leads, and delicate winding work.
Shop Fine 6N OCC Wire 0.01–0.1mm →Medium 6N OCC Wire (0.1–1mm)
General-range solid 6N single crystal copper wire for headphone recabling, interconnects and signal lines, small speaker runs, and coil winding.
Shop Medium 6N OCC Wire 0.1–1mm →Heavy 6N OCC Wire (1–3mm)
Thicker solid 6N mono-crystal OCC wire for HiFi speaker and power cable conductors, ground runs, bus links, and larger-gauge winding projects.
Shop Heavy 6N OCC Wire 1–3mm →Diameters, Gauges & Custom Lengths
Bare solid 6N single crystal copper wire is available from 0.01 mm to 3 mm diameter, with each size shown in millimeters and its AWG gauge equivalent so you can match audio cable builds or engineering drawings. 6N OCC wire is supplied on spools for continuous runs or cut to your specified straight length, in the exact quantity your cable build or winding project requires.
Why Choose 6N Single Crystal Copper Wire (OCC)
Common Applications
6N single crystal copper wire is widely used for HiFi interconnect and signal cables, headphone and IEM upgrade (recable) builds, earphone braided wire, speaker cable and power cable conductors, ground and bus links, audio transformer and voice-coil winding, precision instrument leads, laboratory and R&D conductors, and high-end wire forming where a clean single-crystal signal path matters.
Shipping & Delivery
Standard (in-stock) 6N single crystal copper wire ships within 1–5 business days.
Custom-cut or processed orders require additional handling time based on processing difficulty and complexity.
After shipment, delivery typically takes 7–15 days to arrive, depending on the destination.
6N Single Crystal Copper Wire FAQ
What does 6N mean in OCC copper wire?
6N means 99.9999% copper purity (six nines). Our 6N single crystal copper wire is mill-certified to this purity and produced by the Ohno Continuous Casting (OCC) single-crystal process.
Is this OCC wire solid or stranded?
This collection is bare, solid single-strand 6N single crystal copper wire. Each ordered diameter is one continuous solid conductor; multi-strand braided cable builds are made by the cable maker from these solid wires.
What diameters and lengths are available?
Solid 6N OCC wire ranges from 0.01 mm to 3 mm in twenty diameters, listed in millimeters and AWG equivalents, supplied on spools or cut to a custom length.
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