🔩 M3–M6 99.9% Pure Copper Phillips Pan Head Machine Screws – T2 Copper, Metric Coarse Thread
You're building a custom electrical panel, restoring a vintage radio, or working on a marine grounding system – and standard steel screws just won't do. These machine screws are made from 99.9% pure T2 copper, giving you excellent electrical conductivity, corrosion resistance, and a warm, distinctive look. The Phillips pan head sits low with a wide bearing surface, perfect for bus bars, terminal blocks, or decorative hardware. Available in M3, M4, M5, and M6 diameters with metric coarse thread. Use them where conductivity matters, where you need non‑magnetic fasteners, or simply when you want hardware that stands out. Each screw is fully threaded and ready for your next project.
✨ Key Features – Pure Copper Pan Head Machine Screws
- 🔘 99.9% pure T2 copper – Excellent electrical and thermal conductivity. Ideal for grounding, battery terminals, and high‑current connections.
- 🛡️ Naturally corrosion resistant – Copper develops a protective patina over time. Great for marine, outdoor, and historical restoration work.
- 🔘
Phillips pan head – Low profile with wide bearing surface. Distributes clamping force evenly, reduces risk of pull‑through.
- 🧲 Non‑magnetic – Perfect for sensitive electronic or MRI environments where steel fasteners cannot be used.
- 📏 Metric sizes M3, M4, M5, M6 – Four commonly used diameters for electronics, machinery, and general assembly.
- 📐 Fully threaded, coarse pitch – Thread runs the entire length under the head. Metric coarse standard for easy starting and strong grip.
- 🎨 Distinctive warm color – Adds a unique, premium look to custom builds, audio equipment, or art projects.
📏 Specifications – Pure Copper Phillips Pan Head Screws (T2 Copper)
:
≥ 97% IACS (International Annealed Copper Standard)。
Good – forms protective patina; suitable for marine/outdoor use
| Parameter |
Details |
| Product name |
Pure Copper Phillips Pan Head Machine Screws – Set (M3–M6) |
| Material |
99.9% T2 Copper (high purity, oxygen‑free grade) |
| Thread type |
Metric coarse thread (fully threaded) |
| Head style |
Pan head, Phillips drive |
| Available diameters |
M3, M4, M5, M6 (select sizes from dropdown) |
|
Length range (per size) |
Varies – typical lengths from 6mm to 50mm (see individual listings) |
❓ Frequently Asked Questions – Pure Copper Machine Screws
1. Why choose copper screws over stainless steel or brass?
Copper offers the highest electrical and thermal conductivity of common fastener materials – about 5‑10 times better than stainless steel. It’s also non‑magnetic, non‑sparking, and naturally antimicrobial. For electrical connections, grounding straps, or battery terminals, copper is the gold standard. For general structural strength, stainless steel is stronger, but copper wins when conductivity or aesthetics matter.
2. Will these screws tarnish or turn green over time?
Yes – copper naturally oxidizes when exposed to air and moisture, forming a brown or greenish patina (verdigris). This patina is protective and actually stops further corrosion. Many people love the aged look for vintage restorations. If you prefer a bright finish, you can polish them occasionally or apply a clear lacquer.
3. Are these screws strong enough for structural applications?
Pure copper has lower tensile strength than steel – roughly 200-250 MPa compared to 400-800 MPa for low‑carbon steel. They are suitable for electrical connections, light assembly, electronics mounting, and decorative work. For load‑bearing furniture or heavy machinery, use steel fasteners. These copper screws excel where conductivity or non‑magnetic properties are critical.
4. Can I use these screws in saltwater or marine environments?
Yes – copper is surprisingly resistant to saltwater corrosion. It’s often used for boat fittings, plumbing, and marine hardware. However, avoid direct contact with aluminum or galvanized steel in saltwater, as galvanic corrosion can occur (copper is more noble). Use isolation washers or dielectric grease if mixing metals.
5. What’s the difference between T2 copper and regular copper?
T2 is a high‑purity copper grade (≥99.9% Cu) with very low oxygen content. It offers excellent conductivity, ductility, and corrosion resistance. It’s the standard for electrical and thermal applications. Lower grades (like T1 or T3) may have slightly less purity or more impurities, but T2 is the most common for fasteners and bus bars.
6. Do these screws come with matching nuts or washers?
This listing is for screws only. We also sell pure copper hex nuts, washers, and flat washers separately – check our store. Using copper nuts with copper screws ensures no galvanic issues and maintains conductivity through the joint.
