M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer
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M3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYerM3 Aluminum Alloy Countersunk Bolts Allen Socket Screws Anodized DIY Model - HomeDIYer

M3 Aluminum Alloy Countersunk Screws Allen Socket Head Anodized – 9 Colors, 10 Lengths

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Price:
$2.50 USD
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In stock (1000 units), ready to be shipped

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Description

M3 Aluminum Alloy Countersunk Screws — Allen Socket Head, Anodized, 9 Colors, 10 Lengths

Standard steel screws add unnecessary weight, corrode over time, and offer no visual differentiation in precision builds — a real limitation in RC models, custom bicycle frames, and aerospace model assemblies where every gram counts and a flush, color-matched finish matters. These M3 aluminum alloy countersunk screws feature an Allen (hex socket) drive and an anodized surface treatment, available in 9 vibrant colors and 10 lengths from 6mm to 30mm to match your exact fastening requirements.

Each screw is machined from high-strength aluminum alloy with an anodized surface treatment for excellent corrosion resistance, rust prevention, and a hard, color-fast finish. The countersunk flat head seats flush with or below the surface of the material for a clean, snag-free finish. The internal Allen (hex socket) drive requires a 2.5mm hex key and allows precise torque application with reduced cam-out risk. Standard M3 metric thread pitch (0.5mm) ensures compatibility with any standard M3 nut, tapped hole, or threaded insert. Tolerance: ±0.3mm.

These M3 aluminum countersunk screws are widely used in aerospace industry models, aviation and RC model toy accessories, high-end aluminum alloy bicycle frames, golf club heads, mechanical equipment, mold processing, computer accessories, and general DIY precision builds where a lightweight, corrosion-resistant, flush-mount fastener with a color-matched anodized finish is needed.

✅ M3 metric thread (0.5mm pitch). Compatible with standard M3 nuts, tapped holes, and threaded inserts. Countersunk head requires a matching countersunk hole. Allen (hex socket) drive — 2.5mm hex key required. Available in 9 anodized colors and 10 lengths: M3 × 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 25 / 30mm. Tolerance: ±0.3mm.

✅ Key Features of These M3 Aluminum Countersunk Screws

  • 🔩 High-Strength Aluminum Alloy — Lightweight, Non-Magnetic & Corrosion Resistant: Machined from high-strength aluminum alloy with an anodized surface treatment, providing excellent corrosion resistance and rust prevention. Aluminum is significantly lighter than steel and non-magnetic, making these screws ideal for weight-sensitive and magnetically sensitive precision build applications such as RC models, drones, and aerospace model assemblies.
  • 🛠️ Countersunk Flat Head — Flush-Mount, Snag-Free Finish: The tapered flat head seats into a countersunk hole, pulling the screw head flush with or below the surface of the material for a clean, aerodynamic, snag-free finish — ideal for panels, frames, and any assembly where a protruding head would interfere with adjacent components, cables, or surfaces.
  • 🔧 Allen (Hex Socket) Drive — Precise Torque, Reduced Cam-Out: The internal 2.5mm hex socket drive allows precise torque application with a standard Allen key, significantly reducing the risk of cam-out and surface damage compared to Phillips or slotted drives — important in precision aluminum builds where thread stripping must be avoided.
  • 📰 10 Lengths Available — M3 × 6mm to 30mm: Available in M3 × 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 25 / 30mm, covering a wide range of material thickness and fastening depth requirements across M3 metric applications. Select your preferred length and color from the variant options above.
  • 🎨 9 Anodized Color Options: Available in Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, and Sky Blue anodized finishes. Color-match your build, color-code different fastener zones, or add a custom accent to your project. The anodized finish is integrated into the aluminum surface for a hard, color-fast layer that resists fading and chipping under normal use conditions.
  • ⚡ Standard M3 Thread — ±0.3mm Precision Tolerance: Standard M3 metric thread pitch (0.5mm) ensures compatibility with any standard M3 nut, tapped hole, or threaded insert. Consistent ±0.3mm tolerance ensures smooth engagement without cross-threading or loose fits across all lengths and colors.

🎯 Who Is This For?

✈️ RC, Drone & Aerospace Model Builders

Ideal for RC model frames, FPV drone builds, aviation model toy accessories, and aerospace model assemblies where lightweight, color-matched aluminum countersunk screws with a flush-mount finish are needed to reduce weight and eliminate snag points on panels and covers.

🚴 Bicycle Frame & Sports Equipment Builders

Used in high-end aluminum alloy bicycle frame assembly, golf club head builds, and sports equipment where lightweight, corrosion-resistant countersunk screws with a color-matched anodized finish are needed for both structural fastening and a clean, professional appearance.

🔧 Mechanical Equipment & Computer Modders

Suitable for mechanical equipment assembly, mold processing, and computer case modding where precise, lightweight M3 countersunk screws with consistent tolerances and a flush-mount finish are required for panel fastening, bracket mounting, and component assembly.

🎨 DIY Makers & Custom Builders

Perfect for any DIY precision build, custom enclosure, or fabrication project where a lightweight, anodized color-matched countersunk screw adds both structural function and a clean, professional flush-mount aesthetic to the finished assembly.

Material Aluminum Alloy (Anodized)
Head Style Countersunk (Flat Head — flush-mount)
Drive Style Allen (Hex Socket / Internal Hex) — 2.5mm hex key required
Thread Size M3
Thread Pitch 0.5mm (standard M3 metric)
Available Lengths 6mm / 8mm / 10mm / 12mm / 14mm / 16mm / 18mm / 20mm / 25mm / 30mm
Available Colors Royal Blue, Green, Golden, Dark Red, Black, Silver, Purple, Rose Red, Sky Blue (anodized)
Surface Treatment Anodizing (corrosion & oxidation resistant)
Tolerance ±0.3mm
Typical Applications Aerospace models, RC toys, bicycle frames, golf club heads, mechanical equipment, mold processing, computer accessories, DIY precision builds

❓ Frequently Asked Questions

What thread pitch do these M3 countersunk screws use?

These screws use standard M3 metric thread pitch (0.5mm). They are compatible with any standard M3 nut, tapped hole, or threaded insert. The ±0.3mm tolerance ensures smooth engagement without cross-threading or loose fits.

What Allen key size do I need for the hex socket drive?

These M3 countersunk Allen screws require a 2.5mm hex key (Allen wrench). A standard ball-end or long-arm hex driver works well. Avoid using worn or undersized keys to prevent rounding the socket.

Do I need to pre-drill a countersunk hole?

Yes. Countersunk screws require a matching countersunk (chamfered) hole in the material to allow the tapered flat head to seat flush with the surface. A countersink drill bit at the appropriate angle (typically 90°) is used to create the countersunk recess before installing the screw.

Are these screws suitable for high-stress or safety-critical applications?

These are aluminum alloy screws, which are lighter but not as strong as steel. For high-torque or safety-critical parts such as brake mounts or steering components, steel hardware is recommended. For non-structural applications such as fairings, battery covers, non-structural brackets, and visual accents on bike frames, these aluminum screws work well.

Will the anodized color fade or chip over time?

The anodized finish is integrated into the surface of the aluminum rather than applied as a paint or coating, making it generally more resistant to fading and chipping than painted alternatives under normal use conditions. Hard impacts or heavy abrasion may leave marks, as with any aluminum hardware.

Are these screws lighter than steel M3 countersunk screws?

Yes. Aluminum alloy is significantly lighter than steel — typically about one-third the weight for the same volume. These screws are also non-magnetic, making them suitable for applications where magnetic interference must be avoided.

What lengths are available?

These M3 countersunk screws are available in 10 lengths: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 25mm, and 30mm. Select your preferred length and color from the variant options above.

🛒 Select your Color and Thread Diameter × Length above, then add to cart.

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