M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary
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M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts OrdinaryM3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary

M3 M4 6#-32UNC Anodised Aluminium Knurled Thumb Screws Thumbscrew Bolts Ordinary

HomeDIYer
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By HomeDIYer®

Price:
$2.83 USD
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In stock (500 units), ready to be shipped

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Description

Anodised Aluminium Knurled Thumb Screws — Tool-Free Fastening in M3, M4 & 6#-32UNC

When you need to adjust, remove, or secure panels, enclosures, or equipment covers repeatedly without reaching for a screwdriver, standard hex bolts become a daily frustration. Makers, electronics hobbyists, PC builders, and lab technicians all face the same problem: fasteners that slow down hands-on work. These anodised aluminium knurled thumb screws are designed specifically for users who need fast, repeatable, tool-free fastening in lightweight assemblies.

Each thumb screw is machined from aluminium alloy and finished with an anodised colour coating for corrosion resistance and visual identification. The knurled head provides a secure grip surface for finger-tightening. Available in three thread standards — M3, M4, and 6#-32 UNC — with head diameters and shank lengths suited to each size. Sold individually (1 pc), in packs of 5, or packs of 10 to match your project scale.

Typical applications include securing side panels on custom PC cases and electronics enclosures, fastening access covers on 3D printer frames and CNC router housings, and attaching removable fixtures in laboratory equipment or optical rail systems where tool-free thumb screw access is essential.

⚙️ Compatible with M3, M4, and 6#-32 UNC threaded holes. Verify thread pitch and hole depth before ordering. Mix colours across sizes for panel identification.

✅ Key Features of These Anodised Aluminium Knurled Thumb Screws

  • 🔩Knurled Head for Finger Grip — The circumferential knurl pattern on the head provides reliable purchase for hand-tightening and loosening without tools, even in confined spaces.
  • 🎨10 Anodised Colour Options — Available in Dark Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, and Orange. Anodising provides a durable, integrated colour layer rather than a surface coating.
  • ⚖️Lightweight Aluminium Alloy Construction — Aluminium alloy keeps fastener weight minimal, making these thumb screws well suited for weight-sensitive builds such as portable enclosures and camera rigs.
  • 📐Three Thread Standards Covered — M3 and M4 metric threads serve European and Asian equipment standards; 6#-32 UNC covers common North American electronics and PC hardware thread patterns.
  • 📦Flexible Pack Quantities — Order 1 pc for a single replacement, 5 pcs for a small project, or 10 pcs for a full enclosure build. Consistent pricing per unit across pack sizes.
  • 🛡️Anodised Finish for Corrosion Resistance — The anodised surface layer resists oxidation in typical indoor environments, maintaining appearance and thread integrity over repeated installation cycles.

📐 Technical Specifications — Anodised Aluminium Knurled Thumb Screws

Material Aluminium alloy
Surface Finish Anodised
Thread Standards M3, M4, 6#-32 UNC
Head Style Knurled round head
Drive Type Hand / finger (tool-free)
Available Colours Dark Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Orange
Pack Quantities 1 pc, 5 pcs, 10 pcs
Head Diameter See variant options
Overall Length See variant options
Thread Pitch See variant options
Weight per Piece See variant options

❓ Frequently Asked Questions

How do I choose between M3, M4, and 6#-32 UNC?

M3 and M4 are ISO metric thread sizes common in European and Asian electronics, 3D printers, and CNC equipment. M3 has a 3 mm nominal diameter; M4 has a 4 mm nominal diameter. 6#-32 UNC is a Unified National Coarse thread used widely in North American PC hardware, rack-mount equipment, and electronics enclosures. Check the thread specification of your existing tapped holes or nuts before selecting a size.

Are these thumb screws strong enough for structural fastening?

These thumb screws are designed for light-duty panel retention and access cover fastening where hand-tightening torque is sufficient. Aluminium alloy provides adequate strength for securing enclosure panels, 3D printer covers, and similar non-structural applications. They are not intended for high-torque structural joints or applications subject to significant vibration without additional locking measures.

How durable is the anodised colour finish?

Anodising creates an oxide layer integrated into the aluminium surface rather than a paint or plating applied on top. This makes the colour resistant to chipping and peeling under normal handling. The finish resists mild corrosion in typical indoor environments. Prolonged exposure to harsh chemicals or abrasive contact can wear the anodised layer over time.

Can I use these in outdoor or high-humidity environments?

The anodised finish provides moderate corrosion resistance suitable for indoor and sheltered environments. For sustained outdoor exposure or high-humidity industrial settings, consider whether additional sealing or a stainless steel alternative would be more appropriate. Contact us to confirm suitability for your specific environment.

Will the colour match between different order batches?

Anodised colour can show minor batch-to-batch variation due to the nature of the electrochemical process. If colour consistency across multiple orders is critical — for example, on a visible front panel — we recommend ordering all required pieces in a single order.

Which pack size should I order for a standard PC case or electronics enclosure?

Most standard ATX and mid-tower PC cases use between 4 and 8 thumb screws for side panels. A 5 pc or 10 pc pack typically covers a full enclosure build with spares. For a single replacement or prototype test fit, the 1 pc option lets you verify thread compatibility before committing to a larger quantity.

Are the threads cut or rolled, and does it affect compatibility?

Thread form follows standard M3, M4, and 6#-32 UNC specifications, ensuring compatibility with any correctly tapped hole or standard nut of the matching size. If you are unsure whether your existing holes are tapped to the correct standard, use a thread gauge or contact us to confirm before ordering.

🛒 Select your size, colour, and pack quantity above, then add to cart.

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