1–2pcs PEEK Plastic Hex Socket Cap Screws M4–M8 for Heat & Electrical Insulation

PEEK Hex Socket Head Cap Screws – Heat-Resistant & Non-Conductive Fasteners M4 to M8, 2–100mm

🔧 High-Temperature PEEK Plastic Screws for Electronics, Machinery & Industrial Insulation

Need precision fasteners that can withstand high heat and resist electricity? These PEEK (Polyether ether ketone) hex socket cap screws are engineered for thermal insulation, non-conductive performance, and chemical resistance in demanding environments.

Ideal for use in electronic circuit boards, electrical enclosures, high-voltage systems, lab equipment, and custom machinery, these plastic screws outperform traditional metal fasteners in insulation-critical applications.

Available in metric thread sizes M4 to M8 and lengths from 2mm to 100mm (0.08"–3.94"), with custom sizing supported.

⚙️ Product Features & Benefits

• 100% PEEK Material
  Made from high-performance PEEK for excellent thermal and electrical insulation.

• Extreme Heat Resistance
  Withstands temperatures up to 260°C (500°F) — perfect for high-temp assemblies.

• Non-Conductive
  Protects sensitive components from short circuits and electrical interference.

• Corrosion & Chemical Resistant
  Performs reliably in harsh environments where metal screws degrade.

• Hex Socket Head Cap Design
  Enables efficient installation with precise torque and strong fastening.

• Available Sizes

  • Thread sizes:
    M4 (≈ 0.157")
    M5 (≈ 0.197")
    M6 (≈ 0.236")
    M8 (≈ 0.315")

  • Lengths:
    2mm to 100mm (≈ 0.08" to 3.94")

🛠 Recommended Applications

These heat-resistant plastic screws are the go-to choice for:

• PCB and electronic assembly

• Electrical insulation in high-voltage equipment

• Medical and lab device manufacturing

• Aerospace and automotive prototypes

• Custom-built enclosures and 3D printer modules

PEEK screws offer unmatched balance between mechanical strength and non-metallic insulation, ideal for advanced engineering use.

📦 Product Details

• Material: Pure PEEK (Polyether ether ketone)

• Screw Type: Machine Screws

• Head Style: Round Cap Head

• Drive Style: Hex Socket

• Available Threads: M4 / M5 / M6 / M8

• Available Lengths: 2mm – 100mm

• Package Quantity: 1 or 2pcs per set

• Certification: CE Certified

• Custom Orders: Supported – we can cut to any dimension or produce non-standard threads

✅ Why Choose Custominsul?

At Custominsul, we understand what engineers and manufacturers need:

• ✔️ A wide range of high-performance plastic materials

• ✔️ Support for custom CNC machining and fabrication

• ✔️ Fast turnaround and international shipping

• ✔️ Responsive service that helps you reduce procurement costs

• ✔️ Transparent pricing for both small and bulk orders

We don’t just sell fasteners. We help you get the right plastic solutions at the right price.

🛒 Ready to Buy or Customize?

Need durable, high-temperature screws today? Select your size and order now.
Looking for M2, M10, or special dimensions? We offer custom PEEK screw production tailored to your specs.

👉 [Buy Standard Sizes – M4 to M8, 2mm to 100mm]
👉 [Request Custom Screws or Bulk Pricing]

❓ Frequently Asked Questions

Q1: What makes PEEK better than other plastics for screws?
PEEK offers high tensile strength, heat resistance up to 260°C, and exceptional chemical resistance — ideal for demanding industrial and electronic applications.

Q2: Are these screws safe for PCB or power supply assembly?
Yes. PEEK screws are non-conductive and won’t short circuit your sensitive components.

Q3: Can I order other sizes like M2.5 or M10?
Absolutely. We support full customization — just contact us with your requirements.

Q4: Do you offer bulk pricing for manufacturers?
Yes, we offer OEM and volume discounts for industrial buyers.

Q5: How fast is shipping to the U.S. and Europe?
Standard orders ship in 3–5 business days. Custom orders typically ship in 5–10 days.

📏 Size Chart (Metric to Inch)

📌 Need a size not listed? We can machine it.