🔘 Alu Grip Step Thumb Screws – Knurled Fixing with Stainless Steel Thread (35mm & 40mm Long, M3–M6, 10 Colours)
You need a thumbscrew that reaches deep into a machine guard, a thick panel, or a custom fixture – and you want a comfortable, colourful grip that won’t rust. These step thumb screws feature a long stainless steel stud (35mm or 40mm total length) combined with a knurled anodised aluminium head. The precision step (shoulder) acts as a built‑in spacer or bearing surface, while the fully threaded section gives you a secure hold. Available in M3, M3.5, M4, M5, and M6 metric threads. Choose from 10 vibrant anodised colours. Perfect for PC modding, camera rigs, 3D printers, and any DIY application requiring a tool‑less, long‑reach hand fastener.
✨ Key Features – Long Step Thumb Screws (35/40mm)
- 📏 Long total lengths: 35mm and 40mm – Extra reach for thick materials or deep threaded holes. Fully threaded after the step.
- ⚙️ Precision step (shoulder) design – Smooth, unthreaded section provides built‑in spacing and acts as a bearing surface.
- 🎨 Anodised aluminium grip knob – Lightweight, colourful, and diamond‑knurled for a secure, non‑slip hand grip – no tools needed.
- 🛡️ Stainless steel threaded stud – Corrosion‑resistant and strong. Fully threaded from the step to the tip.
- 📏 Metric sizes M3, M3.5, M4, M5, M6 – Covers small to medium fastening needs.
- 🌈 10 vivid anodised colours – Wine red, pink, golden, royal blue, sky blue, black, silver, green, purple, brown orange.
- 🔧 Tool‑less operation – Tighten and loosen by hand. Ideal for frequent adjustments or quick‑release panels.
📏 Specifications – Long Step Thumb Screws (Aluminium + Stainless Steel)
| Thread Diameter (M) |
Thread Pitch (mm) |
Total Length Options (mm) * |
Step (Shoulder) Length (approx.) |
Thread Length (approx.) |
Head Style |
Head Material / Colours |
| 📐 Total length = step (unthreaded) + threaded section. Select exact size, colour and length from dropdown. |
| M3 |
0.5 |
35 mm ・ 40 mm |
4–6 mm (varies by size) |
Total length minus step |
Round knurled (step head) |
6061 aluminium / Anodised (10 colours) |
| M3.5 |
0.6 |
| M4 |
0.7 |
| M5 |
0.8 |
| M6 |
1.0 |
* Step length may vary slightly by thread size – contact us for exact dimensions. Other lengths available on request (e.g., 25mm, 30mm, 45mm). Please consult customer service.
🎨 Available Anodised Colours – Personalise Your Build
| Colour |
Best Suited For |
| Wine red / Pink / Purple |
Gaming PC cases, custom modding, artistic projects |
| Golden / Royal blue / Sky blue |
High‑contrast accents, camera rigs, racing simulators |
| Black / Silver |
Industrial equipment, professional tools, minimalist builds |
| Green / Brown orange |
Outdoor gear, military‑style projects, nature themes |
❓ Frequently Asked Questions – Long Step Thumb Screws
1. What is the step (shoulder) for?
The smooth step acts as a built‑in spacer or pivot point. It can pass freely through a hole, allowing the threaded part to engage a nut or tapped hole while the step provides precise positioning. Ideal for quick‑release mechanisms and hinged assemblies.
2. How do I measure the total length of a step thumb screw?
Total length is measured from the underside of the aluminium head to the tip, including both the step and the threaded section. For example, a “35mm” screw has a total stud length of 35mm. The step and thread lengths are not listed separately – choose the overall length that matches your application.
3. Can I get other total lengths, like 25mm or 50mm?
Yes – we offer custom lengths. Please contact customer service with your required total length, thread size, and colour. We can manufacture to your specifications.
4. Will the anodised colour fade or scratch easily?
Anodising is a hard, electrochemical finish that bonds to the aluminium. It resists scratches and fading far better than paint. Normal hand use will not remove the colour.
5. Are these screws suitable for outdoor use?
The stainless steel stud offers good corrosion resistance for indoor and light outdoor use. The anodised aluminium head is also corrosion‑resistant. For continuous saltwater or harsh chemical environments, consider A4 (316) stainless studs – contact us for custom orders.
6. Do I need a nut or washer with these screws?
If your equipment has a pre‑tapped metric hole of the same thread size, no nut is needed. For plain holes, use a standard metric nut of the same size (e.g., M4 nut for M4 screw). A flat washer is optional for load distribution.
