🎨 M3.5–M6 Aluminium Knurled Thumb Screws – Anodised Hand Grip Knob Bolts for DIY & PC Modding
You’re adding a custom touch to your PC case, camera rig, or 3D printer – and you want thumbscrews that look as good as they work. These M3.5, M4, M5 and M6 aluminium thumb screws are machined from 6061 alloy and finished with a bright anodised coating. The flat, diamond‑knurled head gives you a secure, non‑slip grip for tool‑less tightening and loosening. Available in a variety of vibrant colours to match your build or project theme. Fully threaded, with lengths measured under the head. Lightweight, corrosion‑resistant, and non‑magnetic – perfect for computer case panels, camera bracket locks, and any application where style meets function.
✨ Key Features – Aluminium Anodised Knurled Thumb Screws
- 🔘 Flat knurled head – Diamond knurling provides excellent fingertip grip for hand tightening – no tools required.
- 🎨 Vibrant anodised colours – Add a unique look to your project. Available in multiple colours (select from dropdown).
- ⚖️ Lightweight 6061 aluminium – About 1/3 the weight of steel. Non‑magnetic and thermally conductive.
- 🛡️ Corrosion & oxidation resistant – Anodised finish protects against rust and wear, even in humid environments.
- 📏 Wide metric range M3.5, M4, M5, M6 – Covering small electronics to light machinery and PC hardware.
- 📐 Fully threaded stud, length under head – Thread runs the entire length under the head for maximum grip in tapped holes or with nuts.
- 🔧 Versatile use – DIY modifications, camera lens housing fixation, computer case side panels, 3D printer bed leveling, RC models, and more.
📏 Specifications – M3.5–M6 Aluminium Knurled Thumb Screws
| Thread Diameter (M) |
Thread Pitch (mm) |
Head Style |
Head Diameter (approx.) |
Head Height (approx.) |
Material / Finish |
Stud Length (mm, under head) * |
| 📐 Length measured from underside of head to tip. Fully threaded. Select exact size, colour and length from dropdown. |
| M3.5 |
0.6 |
Flat knurled |
~8‑10 mm |
~4‑5 mm |
6061 aluminium / Anodised |
Select from dropdown (typical range 4–30mm) |
| M4 |
0.7 |
~9‑12 mm |
~5‑6 mm |
| M5 |
0.8 |
~10‑14 mm |
~6‑8 mm |
| M6 |
1.0 |
~12‑16 mm |
~7‑9 mm |
* Stud lengths vary – please select from dropdown. Due to shooting techniques and batch differences, actual colour may vary slightly from photos.
📋 Why Choose Anodised Aluminium Thumb Screws?
| Property |
Benefit |
| High strength heat‑treatable alloy |
Good mechanical performance, wear resistance, and long service life. |
| Anodised finish |
Excellent corrosion and oxidation resistance – won’t rust. Vibrant colours that last. |
| Lightweight & non‑magnetic |
Ideal for portable devices and applications where weight or magnetism is a concern. |
| Easy to process |
Precision threads, smooth finish, and consistent quality. |
❓ Frequently Asked Questions – Aluminium Knurled Thumb Screws
1. How do I measure the length of these thumb screws?
The length is measured from the underside of the head (where the knurling meets the shaft) to the tip of the threaded stud. The head itself is NOT included. For example, an “M4 x 10mm” screw has a 10mm long threaded shaft under the head. Select your required stud length from the dropdown.
2. Are these screws fully threaded? What about longer lengths?
Yes – all screws in this range are fully threaded from under the head to the tip, ensuring maximum grip in tapped holes or when using a nut.
3. Will the anodised colour fade or scratch easily?
Anodising is a durable electrochemical finish that bonds to the aluminium. It resists scratches and fading far better than paint. Normal hand use will not remove the colour. Slight colour variations may occur between batches or due to lighting – this is normal.
4. Can I use these screws outdoors? Will they rust?
Aluminium naturally forms a protective oxide layer, and the anodised finish adds extra corrosion resistance. They are suitable for indoor and light outdoor use. For continuous saltwater or harsh chemical environments, we recommend stainless steel thumb screws.
5. Do I need a nut or washer with these thumb screws?
If your equipment has a pre‑tapped hole of the same thread size, no nut is needed. For plain holes, use a standard metric nut (M3.5, M4, M5, or M6). A flat washer is optional for load distribution.
6. What colours are available? Can I request a specific colour?
We offer a range of anodised colours – please select from the dropdown if options are shown. For custom colours or large orders, contact us.
