🔧 Product Overview: M3 x 8mm Colour Knurled Thumb Screws – GB835 Aluminum Hand Tighten Grip Knob Bolts
Add a splash of color and tool‑less convenience to your projects with these M3 anodized aluminum knurled thumb screws. Manufactured to GB835 standard, they feature a 10mm diameter round knurled head (5mm thick) for a comfortable, non‑slip grip. The 8mm thread length (measured under the head) is ideal for securing PC case side panels, graphics cards, 3D printer parts, camera brackets, and electronic enclosures. Fully threaded with M3 coarse pitch (0.5mm). Available in 10 vibrant anodized colors: Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, and Orange. Lightweight, corrosion‑resistant, and easy to use – no tools required.
✨ Why These Colour Anodized Knurled Thumb Screws Are a DIY Essential
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GB835 standard compliant – Precision manufacturing ensures consistent dimensions and reliable performance.
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10 vibrant anodized colors – Choose from Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, or Orange to match your build.
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Knurled round head (10mm dia, 5mm thick) – Diamond knurl pattern provides excellent finger traction for hand tightening – no tools needed.
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M3 metric thread – fully threaded, 8mm length – Standard coarse pitch (0.5mm). Ideal for panel thicknesses up to 5‑6mm.
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Lightweight aluminum alloy with oxidation treatment – Corrosion‑resistant, high strength, and durable. Smooth, burr‑free finish.
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Wide applications – PC cases, side panels, hard drives, optical drives, network cards, graphics cards, sound cards, electric toys, motorcycles, fishing gear, furniture, and DIY modifications.
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Also suitable for – Mechanical equipment, communication equipment, electronic devices, automotive industry, instruments, lighting products, aerospace, construction, and medical equipment.
📏 Technical Specifications – M3 x 8mm Knurled Thumb Screw (GB835)
| Product Type |
Colour Knurled Thumb Screws (Hand Tighten Grip Knob Bolts) |
| Standard |
GB835 (National Standard) |
| Material |
Aluminium alloy (anodized / oxidized) |
| Thread Size |
M3 |
| Thread Pitch |
0.5mm (metric coarse) |
| Thread Length (under head) |
8mm |
| Length Measurement |
Under head – from underside of head to tip (head not included) |
| Head Diameter |
10mm (±0.3mm) |
| Head Thickness |
5mm (±0.3mm) |
| Head Style |
Round knurled head (diamond knurl pattern) |
| Drive Style |
Hand grip (toolless) |
| Available Colors (10) |
Wine Red, Rose Red, Golden, Royal Blue, Sky Blue, Black, Silver, Green, Purple, Orange |
| Tolerance |
±0.3mm |
❓ FAQs – M3 Anodized Knurled Thumb Screws
🔸 Will these screws fit my PC case or graphics card?
Most PC case side panels, graphics card brackets, and drive bays use M3 threads. The 8mm thread length is designed for panel thicknesses up to 5‑6mm with standard threaded holes. For typical 1‑2mm steel panels, 8mm provides ample thread engagement. Check your existing screws – if they are M3, these will fit perfectly.
🔸 How is the 8mm thread length measured? Is it the total length?
Thread length is measured from the underside of the knurled head to the tip. The head itself is not included. Total length (including the 5mm head) is approximately 13mm.
🔸 Are these screws fully threaded? What is the thread pitch?
Yes – fully threaded from under the head to the tip. The pitch is standard M3 coarse: 0.5mm.
🔸 Will the anodized color fade or wear off?
Anodizing is an electrochemical process that bonds the color to the aluminum surface. It is durable and will not peel like paint. Under normal hand use, the color will remain vibrant for years. Heavy abrasion may wear the finish, but typical thumb screw applications are gentle.
🔸 Can I use these screws with nuts, or are they for tapped holes only?
These are standard machine screws – they work with matching M3 nuts or in pre‑tapped holes. For through‑hole applications, use a nut on the back side. The knurled head is for hand grip only – do not use tools on the knurling.
🔸 Are these screws magnetic? Will they affect my PC components?
Aluminum is non‑magnetic, so these thumb screws will not interfere with hard drives, fans, or other sensitive electronics. They are completely safe for use inside computers.
