M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts
M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts
M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts
M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts
M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts
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M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip BoltsM3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip BoltsM3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip BoltsM3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip BoltsM3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts

M3 x 16mm Knurled Thumb Screws – Anodised Aluminium Flat Head Hand-Grip Bolts

HomeDIYer
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By HomeDIYer®

Price:
$1.39 USD
Stock:
In stock (500 units), ready to be shipped

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Description

 

M3 x 16mm Knurled Thumb Screws — Tool-Free Fastening in 10 Anodised Colors

If you've ever fumbled for a screwdriver just to open an access panel or swap a battery cover, you know how frustrating it gets. Makers, RC hobbyists, electronics builders, and DIYers who work with enclosures, 3D-printed parts, and modular assemblies need fasteners they can tighten and remove by hand — quickly and reliably. These M3 knurled thumb screws are built for exactly that workflow.

Each screw is machined from aluminium and finished with an anodised coating available in 10 colors: Red Wine, Pink, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, and Brown & Orange. The thread diameter is M3 with a length of 16mm (≈5/8"). Packs are available in 1, 4, 10, 20, 50, and 100 pieces to suit single-unit builds and bulk workshop stocking alike.

Typical use cases include securing side panels on RC car chassis, fastening battery covers on FPV drones, assembling 3D printer enclosures, and color-coding access points on electronics project boxes — all without reaching for a tool.

🔩 Compatibility: M3 metric thread (ISO standard, typically 0.5mm pitch). Fits M3 threaded inserts, brass heat-set inserts, M3 nuts, and tapped aluminium or plastic panels. Not compatible with imperial #4-40 or #6-32 threads.

✅ Key Features of These M3 Knurled Thumb Screws

  • ✋Knurled Grip Head — The textured outer ring provides reliable finger-traction for hand-tightening thumb screws without tools, even in tight spaces or with gloves on.
  • 🎨10 Anodised Color Options — Color-code your builds or match your aesthetic. The anodised aluminium finish resists scratching and light corrosion while keeping weight minimal.
  • ⚖️Lightweight Aluminium Construction — Aluminium keeps fastener weight low — a key advantage for weight-sensitive applications like FPV drones, RC vehicles, and portable electronics enclosures.
  • 📐Flat Low-Profile Head — The flat head design sits flush or near-flush against panels, reducing snag points on enclosures and keeping assemblies clean and compact.
  • 📦Flexible Pack Quantities — Order from 1 to 100 pieces per pack. Bulk packs of 50 or 100 are cost-effective for workshop stock; single-piece packs let you replace individual fasteners without waste.
  • 🔄Reusable for Frequent Access Panels — Designed for repeated hand-tightening and removal cycles, these anodised aluminium thumb screws maintain thread integrity across regular use in modular assemblies.

📐 Technical Specifications — M3 Knurled Thumb Screws

Thread Standard M3 (ISO Metric)
Thread Pitch Typically 0.5mm (standard M3 coarse)
Screw Length 16mm (≈5/8")
Head Style Flat / Low-Profile Knurled
Drive Type Hand-operated (no tool required)
Material Aluminium
Finish Anodised (color options: Red Wine, Pink, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Brown & Orange)
Pack Quantities 1 / 4 / 10 / 20 / 50 / 100 pcs
Compatible Threads M3 tapped holes, M3 threaded inserts, M3 nuts
Recommended Use Light-duty, hand-tightened applications
Country of Origin See variant options
Weight per Piece Contact us to confirm
⚠️ Note: These are hand-tightened fasteners intended for light-duty use. Do not apply power tools or exceed hand-tightening torque. For structural or high-vibration applications, consider thread-locking compound or a different fastener type.

❓ Frequently Asked Questions

How do I choose the right length for M3 thumb screws?

These screws are 16mm (approximately 5/8") long. To select the right length, measure the total thickness of the material being fastened, then add 2–3 thread diameters (typically 6–9mm for M3) to ensure adequate thread engagement. For thin panels or enclosures up to about 8–10mm thick, 16mm is generally a versatile and widely compatible choice.

What load or clamping force can these thumb screws handle?

Aluminium thumb screws are designed for light-duty, hand-tightened applications — not for high-torque or structural load-bearing use. For M3 aluminium fasteners, typical hand-tightening torque is generally in the range of 0.3–0.6 N·m. If higher clamping force is required, stainless steel alternatives are recommended.

Are these thumb screws suitable for outdoor or humid environments?

The anodised aluminium finish provides a layer of corrosion resistance suitable for light indoor and semi-protected outdoor use. Prolonged exposure to salt spray or standing water may eventually affect the finish. For harsh outdoor environments, additional protective measures or stainless steel fasteners are recommended.

What thread standard do these screws use — metric or imperial?

These are M3 metric screws with a standard M3 thread pitch (typically 0.5mm), following ISO metric standards. They are compatible with M3 threaded inserts, M3 nuts, and M3 tapped holes. They are not compatible with imperial #4-40 or #6-32 threads.

Can I use these for RC cars, drones, or electronics enclosures?

Yes — M3 knurled thumb screws are widely used in RC vehicles, FPV drones, 3D printer assemblies, and electronics enclosures where tool-free access panels or battery covers need to be opened and closed frequently. The knurled head provides a secure grip even with small fingers or in confined spaces.

Do the anodised colors affect the screw dimensions or thread fit?

No. The anodising process adds only a very thin oxide layer (typically 5–25 microns) that does not meaningfully affect thread dimensions or fit. All color variants share the same M3 thread specification and 16mm length, so you can mix colors across a build without any compatibility concerns.

What is the head style and how is it driven?

These screws feature a flat (low-profile) knurled head designed for hand operation — no screwdriver or hex key required. The knurled outer surface provides friction for finger-tightening, making them ideal for panels and covers that need frequent removal.

🛒 Select your color and pack quantity above, then add to cart — ships from our US warehouse.

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