🔥 M3 Aluminum Countersunk Bolts – Allen Socket Head, Anodized Finish
Ever struggled with rusty screws ruining the look of your custom drone or a color-matched bike build? These M3 aluminum alloy countersunk bolts solve that. The hex socket drive gives you a solid grip without stripping, and the anodized surface resists corrosion while letting you choose from ten vibrant colors. Whether you’re assembling an aerospace model, tuning a golf club head, or modding computer accessories, these flat-head screws sit flush – no snagging, no ugly hardware.
✨ Why These M3 Allen Socket Screws Stand Out
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Anodized aluminum alloy – Excellent corrosion resistance and rust prevention. Your M3 countersunk bolts stay bright and functional even after repeated handling or exposure to humidity.
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10 vibrant colors available – Dark red, rose red, gold, royal blue, sky blue, black, silver, green, purple, and orange. Match your DIY model or high-end bicycle frame perfectly.
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Wide application range – From aerospace industry and aviation model toys to aluminum bike frames, golf heads, mechanical equipment, mold processing, and computer mods. These Allen socket screws fit right in.
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Countersunk head design – Sits flush with the surface for a clean, professional look. No protruding heads that catch on cables or skin.
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Precision tolerance (±0.3mm) – Consistent threading and dimensions mean you won’t fight with cross-threading or loose fits.
📏 Technical Specifications
| Product Name |
M3 Aluminum Alloy Countersunk Bolt – Allen Socket Head |
| Screw Size |
M3 |
| Head Style |
Countersunk (Flat Head) |
| Drive Type |
Hex Allen Socket |
| Material |
Aluminum Alloy |
| Surface Treatment |
Anodized (Corrosion & Oxidation Resistant) |
| Colors Available |
Dark Red, Rose Red, Gold, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Orange |
| Tolerance Range |
±0.3mm |
| Typical Applications |
Aerospace models, bicycle frames, golf heads, mechanical equipment, mold processing, and computer accessories |
❓ Frequently Asked Questions
🔩 Will these M3 countersunk bolts work with standard M3 nuts or threaded holes?
Yes – they follow standard M3 metric thread pitch (0.5mm). They fit any standard M3 nut, tapped hole, or threaded insert. The ±0.3mm tolerance ensures smooth engagement without being too tight or loose.
🎨 Are the colors anodized or just painted? Will they scratch off?
The color is from an anodizing process, not surface paint. Anodizing bonds the dye into the aluminum oxide layer, so it’s much more durable than paint. Normal handling and tool contact won’t easily remove it. However, hard impacts or heavy abrasion may leave marks – treat them like any quality aluminum hardware.
⚙️ Can I use these on a high-stress application like a bicycle stem or motor mount?
These are aluminum alloy screws, which are lighter but not as strong as steel. For high-torque or safety-critical parts (e.g., brake mounts, steering components), we recommend steel hardware. But for fairings, battery covers, non-structural brackets, and visual accents on bike frames, they work great.
📦 What length are these M3 countersunk screws? The spec only shows M3 size.
We offer various lengths (e.g., 4mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm). Please check the variant dropdown above for available lengths in each color. If you need a specific length not listed, just message our support team – we’ll try to source it for you.
🛠️ What Allen key do I need for the hex socket?
These M3 countersunk Allen screws require a 2.5mm hex key (or 2.5mm Allen wrench). A standard ball-end or long-arm hex driver works perfectly. Avoid using worn or undersized keys to prevent rounding the socket.
🚚 Do you ship mixed color packs?
Yes – you can order individual colors per pack, or contact us for custom mixed-color assortments. Our customer service team will help you put together exactly what your DIY model project needs.
