M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer
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M3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYerM3 Aluminum Alloy Allen Bolts Socket Cap Screws Hex Head Anodised Bolts - HomeDIYer

M3 Anodized Aluminum Socket Cap Screws – 6 to 30mm, 9 Colors

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Price:
$2.68 USD
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In stock (1000 units), ready to be shipped

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Description

M3 Anodized Aluminum Socket Cap Screws — 6mm to 30mm, 9 Anodized Colors

Standard stainless steel or black-oxide socket cap screws are functional but add unnecessary weight and offer no color accent in lightweight precision builds where a bold color-matched or color-coded fastener makes the assembly look intentional and professional — a real limitation in FPV drone frames, RC model assemblies, aviation model toy builds, high-end aluminum bicycle frames, golf club head assemblies, and computer case modifications where both weight savings and visual appearance matter. These M3 anodized aluminum socket cap screws combine a lightweight aluminum alloy body with a vibrant anodized color finish, available in 9 anodized colors and 10 lengths from 6mm to 30mm.

Each screw features a cylindrical (cap) head with a hex socket (Allen key) drive recess, machined from high-strength aluminum alloy with an anodized surface treatment for excellent corrosion resistance and rust prevention. The M3 metric thread (3mm nominal diameter, standard 0.5mm pitch) is compatible with M3 threaded holes, M3 nuts, and M3 inserts across a wide range of materials. Tolerance: ±0.3mm. Drive: 2.5mm hex key (Allen key).

These M3 anodized aluminum socket cap screws are widely used in FPV drone frame assembly, RC model vehicle and airplane chassis builds, aviation model toy accessories, high-end aluminum alloy bicycle frame assembly, golf club head machining and assembly, mechanical equipment and mold processing, computer case panel fastening, and any lightweight precision build where a color-matched, corrosion-resistant, hex-socket-drive cap head screw provides both functional fastening and a clean anodized color accent at each fastener location.

✅ M3 metric thread (3mm nominal diameter, 0.5mm standard pitch). Available in 10 lengths: 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 25 / 30mm. 9 anodized colors: Royal Blue, Sky Blue, Rose Red, Dark Red, Golden, Green, Purple, Silver, Black. Drive: 2.5mm hex key (Allen key). Tolerance: ±0.3mm.

✅ Key Features of These M3 Anodized Aluminum Socket Cap Screws

  • 🎨 9 Anodized Colors — Color-Match or Color-Code Your Build: Available in Royal Blue, Sky Blue, Rose Red, Dark Red, Golden, Green, Purple, Silver, and Black anodized finishes. Color-match your FPV drone frame, RC model chassis, bicycle frame, or computer case, or color-code different fastener zones for quick visual identification during assembly and maintenance. The anodized finish is integrated into the aluminum surface for a hard, color-fast layer that resists fading and chipping under normal use conditions.
  • 🔧 Hex Socket (Allen Key) Drive — Cylindrical Cap Head Profile: The cylindrical cap head provides a low-profile, clean appearance at each fastener location with a recessed hex socket drive (2.5mm Allen key) that allows high torque application in confined spaces where a standard open-end wrench cannot reach. The cap head profile sits flush against the surface when fully tightened, making these screws ideal for panel fastening, frame assembly, and any application where a clean, low-profile fastener head is required.
  • ⚡ High-Strength Aluminum Alloy — Lightweight, Non-Magnetic, Corrosion Resistant: Machined from high-strength heat-treatable aluminum alloy with good mechanical performance, good wear resistance, and good corrosion and oxidation resistance. Significantly lighter than steel socket cap screws of the same M3 size and non-magnetic, making these screws ideal for weight-sensitive FPV drone, RC aircraft, bicycle, and electronics enclosure builds where every gram of fastener weight matters.
  • 📐 10 Lengths — 6mm to 30mm for Diverse Grip Depth Requirements: Available in 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 25 / 30mm lengths to cover the most common grip depth requirements in FPV drone frame stacking, RC model chassis assembly, bicycle frame component mounting, and general DIY precision builds. Select the length that provides at least 1× thread diameter (3mm) of thread engagement in the receiving material for reliable fastening.
  • 🔬 M3 Standard Thread — Compatible with M3 Nuts, Inserts, and Threaded Holes: M3 metric thread (3mm nominal diameter, 0.5mm standard pitch) is compatible with M3 threaded holes, M3 hex nuts, M3 nylon insert lock nuts, M3 flanged nuts, M3 heat-set inserts, and M3 threaded standoffs across a wide range of materials including aluminum, steel, brass, and plastic. Tolerance: ±0.3mm.
  • 📦 Versatile Applications — Drones, RC Models, Bicycles, Computer Cases, Precision Machinery: Suitable for FPV drone frame assembly, RC model vehicle and airplane chassis builds, aviation model toy accessories, high-end aluminum alloy bicycle frame assembly, golf club head machining and assembly, mechanical equipment and mold processing, computer case panel fastening, and any lightweight precision build where a color-matched, corrosion-resistant M3 socket cap screw is needed.

🎯 Who Is This For?

🚁 FPV Drone & RC Model Builders

Ideal for FPV drone frame stacking, motor mount fastening, and RC model vehicle and airplane chassis assembly where lightweight, color-matched anodized aluminum M3 socket cap screws provide secure fastening without the weight penalty of steel screws, with 9 anodized color options to color-match or color-code the frame build across 10 available lengths from 6mm to 30mm.

🚴 Bicycle Frame & Component Builders

Used in high-end aluminum alloy bicycle frame assembly, component mounting, and accessory attachment where lightweight, color-matched anodized aluminum M3 socket cap screws provide a clean hex-socket-drive fastening solution with a bold anodized color accent at each fastener location across 10 available lengths.

🖥️ Computer Case Modders & Electronics Builders

Used in computer case panel fastening, electronics enclosure assembly, and consumer electronics builds where lightweight, color-matched anodized aluminum M3 socket cap screws provide a clean cap-head profile with a bold anodized color accent at each fastener location, available in 9 colors and 10 lengths to match any build aesthetic.

🔧 Precision Machinery & Mold Processing

Suitable for mechanical equipment assembly, mold processing, golf club head machining and assembly, and general precision manufacturing where lightweight, corrosion-resistant anodized aluminum M3 socket cap screws provide a clean hex-socket-drive fastening solution with good mechanical performance and ±0.3mm dimensional tolerance.

Material Aluminum Alloy (Anodized)
Thread Size M3 (3mm nominal diameter, 0.5mm standard pitch)
Head Style Socket Cap Head (cylindrical head with recessed hex socket drive)
Drive Hex Socket (Allen Key) — 2.5mm hex key required
Available Lengths 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 25 / 30mm
Available Colors Royal Blue / Sky Blue / Rose Red / Dark Red / Golden / Green / Purple / Silver / Black (anodized)
Surface Treatment Anodizing (corrosion & oxidation resistant)
Tolerance ±0.3mm
Typical Applications FPV drones, RC models, aviation model toys, bicycle frames, golf club heads, mechanical equipment, mold processing, computer cases, consumer electronics, precision DIY builds

❓ Frequently Asked Questions

What size Allen key (hex key) do I need to drive these screws?

M3 socket cap screws typically require a 2.5mm hex key (Allen key) to drive. This is the standard hex socket size for M3 socket cap screws. Verify with a 2.5mm hex key before applying full torque to avoid rounding the socket recess.

What is the difference between a socket cap screw and a countersunk screw?

A socket cap screw (also called a socket head cap screw or Allen bolt) has a cylindrical head that sits above the surface of the material when installed. A countersunk screw (also called a flat head screw) has a tapered head that sits flush with or below the surface of the material when installed in a countersunk hole. These are socket cap screws with a cylindrical head profile.

Are these screws compatible with standard M3 nuts and threaded holes?

Yes. These screws have M3 metric thread (3mm nominal diameter, 0.5mm standard pitch) and are compatible with standard M3 threaded holes, M3 hex nuts, M3 nylon insert lock nuts, M3 flanged nuts, M3 heat-set inserts, and M3 threaded standoffs across a wide range of materials. Tolerance: ±0.3mm.

How do I choose the right screw length for my application?

As a general rule, the screw should engage at least 1× the thread diameter (3mm for M3) of thread in the receiving material for reliable fastening. For through-hole applications (screw passes through one material and threads into a nut or second material), the grip length (unthreaded shank, if any) should match the thickness of the material being clamped. For blind-hole applications (screw threads directly into a tapped hole), the screw should not bottom out in the hole before the head is fully seated.

Are these screws lighter than steel M3 socket cap screws?

Yes. Aluminum alloy is significantly lighter than steel — typically about one-third the weight for the same dimensions. These screws are also non-magnetic, making them suitable for applications where magnetic interference must be avoided, such as near sensitive electronics or sensors in FPV drones and RC models. Note that aluminum socket cap screws have lower tensile strength than steel equivalents and are not suitable for high-load structural fastening applications.

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, heavy abrasion, or contact with strong alkaline or acidic chemicals may damage the anodized layer.

Can I use these screws in outdoor applications?

The anodized aluminum alloy construction provides good corrosion resistance and oxidation resistance, making these screws suitable for many outdoor applications under normal weather conditions. For highly corrosive environments (salt spray, prolonged immersion), stainless steel socket cap screws are generally recommended instead.

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

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