Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2
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Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2

Pure Copper Phillips Countersunk Machine Screws M2–M10, Full Thread, T2

HomeDIYer
1 review

By HomeDIYer®

Price:
$2.92 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Pure Copper Countersunk Machine Screws — Conductive, Flush-Fit, M2 to M10

When steel won't do — because you need conductivity, non-magnetic properties, or a warm antique finish — these 99.9% pure T2 copper Phillips countersunk screws step in. Whether you're wiring a grounding bus bar, restoring a vintage radio, or building a marine electrical panel, copper fasteners are the right call where performance and appearance both matter.

Made from solid T2 copper (no plating, no alloy shortcuts), these screws feature a flat 90° countersunk head that sits perfectly flush with the surface. Fully threaded with coarse metric pitch, they're available in diameters from M2 (4mm) through M10 (50mm) — covering the full range of small-to-medium copper fastener needs. Note: length is measured including the head (e.g., M5 × 8mm = 8mm total from head top to tip).

Ideal for electrical grounding connections, electronics enclosures, marine DIY hardware, antique clock and radio restoration, and decorative woodworking where a copper accent is desired. Available in pack quantities from 1 to 100 pieces per variant.

✅ Compatible with standard metric tapped holes and nuts — M2 × 0.4 through M10 × 1.5 coarse pitch. Works with copper, brass, aluminum, wood, and plastic substrates.

✅ Key Features of These Pure Copper Countersunk Machine Screws

  • 🔩 99.9% Pure T2 Copper: Solid copper throughout — no plating, no brass alloy. Delivers maximum electrical conductivity for grounding, bus bars, and low-resistance connections.
  • 🔧 Phillips Flat Countersunk Head: 90° countersunk profile sits flush with the surface. Phillips cross-drive centers the bit automatically — no cam-out on light torque applications.
  • 🚫 Non-Magnetic & Anti-Spark: Safe for sensitive electronics, MRI-adjacent environments, and locations where ferrous fasteners would cause interference or ignition risk.
  • 🔗 Full Thread, Coarse Metric Pitch: Threads run the entire shank length. Coarse pitch grips firmly in softer materials — wood, plastic, copper, and aluminum — without stripping.
  • 📐 Wide Size Range — M2 to M10: From M2 × 4mm for PCB standoffs and circuit boards up to M10 × 50mm for bus bars and structural copper assemblies. One listing covers it all.
  • 📏 Length Includes the Head: Measurement is total screw length from head top to tip. Order the exact depth of your countersunk hole — no conversion needed.

🎯 Who Is This For?

⚡ Electrical & Grounding Work

Electricians and DIYers building grounding bus bars, battery terminal connections, or copper bonding straps need fasteners that won't add resistance. These T2 copper screws are the standard choice.

⚓ Marine & Outdoor Hardware

Copper's natural anti-fouling properties make it a go-to for above-waterline marine hardware, deck fittings, and saltwater-adjacent electrical connections where galvanic compatibility matters.

🕰️ Antique & Vintage Restoration

Restoring vintage clocks, radios, or scientific instruments often requires period-correct copper fasteners. The flush countersunk head and natural patina match original hardware authentically.

🖥️ Electronics Enclosures & PCB Assembly

Non-magnetic, non-sparking, and conductive — ideal for securing PCB standoffs, shielding panels, and enclosure covers in sensitive electronic assemblies where steel would cause interference.

📐 Technical Specifications

Product Type Phillips Countersunk (Flat Head) Machine Screws — Full Thread
Material 99.9% Pure Copper, Grade T2 (solid copper, no plating)
Drive Style Phillips (cross-head)
Head Style Countersunk / Flat Head — typically 90°, sits flush with surface
Measurement System Metric
Thread Diameters M2, M2.5, M3, M4, M5, M6, M8, M10
Thread Pitch (Coarse) M2×0.4 / M2.5×0.45 / M3×0.5 / M4×0.7 / M5×0.8 / M6×1.0 / M8×1.25 / M10×1.5
Length Range 4mm – 50mm (varies by diameter; see variant options)
Length Measurement Total length including head (head top to tip)
Thread Coverage Fully threaded (full thread from under head to tip)
Pack Quantities 1 / 2 / 3 / 4 / 5 / 6 / 10 / 15 / 20 / 25 / 30 / 40 / 50 / 60 / 100 pcs (varies by size)
Magnetic Properties Non-magnetic
Conductivity Electrically conductive — suitable for grounding applications

❓ Frequently Asked Questions

Why choose pure copper screws over stainless steel or brass?

Copper offers three advantages no other common fastener material matches: (1) Excellent electrical conductivity — ideal for grounding and low-resistance connections. (2) Non-magnetic — critical for sensitive electronics or MRI-adjacent environments. (3) Natural anti-fouling and a distinctive patina that develops over time. Brass is harder, stainless is stronger, but pure copper is unmatched for conductivity and non-sparking applications.

What does "length including head" mean, and how do I measure correctly?

Most machine screws are measured from under the head to the tip (shank only). These screws are measured from the top of the head to the tip — total length. So if your countersunk hole is 10mm deep, order a 10mm screw. Always measure the full depth of your countersunk recess before selecting a size.

Will copper screws corrode or turn green over time?

Yes — copper naturally oxidizes, forming a greenish patina (verdigris). This patina is protective and typically stops further corrosion. In dry indoor environments they'll stay bright longer. For a permanently shiny look, apply a clear lacquer after installation. Many users choose copper specifically for that aged, vintage aesthetic.

Can I use these screws outdoors or in marine environments?

Copper performs well in marine environments and is commonly used for above-waterline hardware and grounding. Avoid direct contact with aluminum without insulation — galvanic corrosion will occur. For extended saltwater immersion, silicon bronze is tougher, but pure copper is a solid choice for above-water marine DIY and electrical bonding.

Are these screws strong enough for structural or load-bearing use?

Copper is softer than steel and is not recommended for high-load structural applications. Use these where conductivity, non-magnetism, or aesthetics are the priority: electrical panels, grounding straps, furniture accents, art installations, or restoring antique instruments. For load-bearing applications, use steel or stainless steel fasteners.

What thread pitch do these screws use — coarse or fine?

All sizes use standard metric coarse pitch: M2×0.4, M2.5×0.45, M3×0.5, M4×0.7, M5×0.8, M6×1.0, M8×1.25, M10×1.5. Coarse pitch provides stronger grip in softer materials and is the most common metric standard for general fastening applications.

Do you offer bulk or trade discounts for larger quantities?

Yes. We provide trade pricing for bulk purchases. Contact us with your required sizes and quantities — the more you order, the lower the per-piece cost. Suitable for manufacturers, restoration workshops, electrical contractors, and makers stocking up on copper fasteners.

What materials can these screws be used with?

These screws work with any material that accepts a standard metric thread: copper, brass, aluminum (with galvanic isolation), wood, plastic, and PCB substrates. They are typically used with matching copper or brass nuts, or driven into pre-tapped holes in softer materials.

🛒 Select your thread diameter × length and pack quantity above, then add to cart.

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