M2.5 Knurled Thumb Screws – Aluminium Colourful Hand Grip Bolts for PC & DIY

Measure the total thickness of the panels or parts you need to clamp together, then add 2–3mm for thread engagement. For example, if your panel stack is 10mm thick, a 12mm (≈15/32") screw is generally a good fit. The three lengths available here are 4mm (≈5/32"), 12mm (≈15/32"), and 15mm (≈19/32"). When in doubt, size up — a slightly longer screw with a nylon lock nut is typically more secure than one that barely engages the threads.

These screws are machined from aluminium alloy, which is lightweight and corrosion-resistant. They are generally suited for light-to-medium clamping loads — panel retention, access covers, and component securing in electronics or hobby builds. For high-vibration or structural applications, a steel fastener with a tool-driven drive is typically more appropriate.

Aluminium naturally forms a thin oxide layer that provides reasonable corrosion resistance, so these screws can typically handle occasional outdoor exposure or light moisture. For prolonged outdoor, marine, or high-humidity environments, a stainless steel fastener is generally recommended. The anodized finish adds an additional layer of surface protection. Contact us to confirm suitability for your specific environment.

These screws follow the ISO metric M2.5 thread standard, which is widely used in PC hardware, electronics, RC vehicles, and precision DIY assemblies. They are not compatible with UNC or UNF inch-based threads. Always verify your tapped hole, threaded insert, or nut is M2.5 metric before ordering. If you are unsure, measure your existing screw's outer thread diameter — M2.5 measures approximately 2.5mm (≈0.098") across the threads.

No. Anodizing adds only a very thin layer — typically under 0.025mm — to the surface, so it does not meaningfully affect thread fit, head diameter, or overall length. All 10 color variants share the same M2.5 thread specification and listed lengths. Color is purely cosmetic and allows you to color-code panels or match your build's aesthetic.

Yes. These screws use standard M2.5 metric threads and are generally compatible with M2.5 hex nuts, nylon-insert lock nuts, and M2.5 brass heat-set threaded inserts commonly used in 3D-printed parts. Confirm thread pitch with your mating hardware if you are using non-standard or fine-pitch inserts.

The most common applications include PC case side panel fasteners (replacing standard Phillips screws for tool-free access), RC car and drone body mounts, 3D printer enclosure panels, electronics project boxes, CNC machine guards, and any DIY assembly where panels need to be removed and reinstalled frequently. The colourful anodized finish also makes them popular for custom PC builds and maker projects where aesthetics matter.