🎨 Product Overview: 5-Piece M3 Aluminum Knurled Thumb Bolts – 5–50mm, Anodized, 10 Colors
Add a pop of color and tool‑less convenience to your projects with these M3 knurled thumb screws. Machined from 6061 aluminum alloy and anodized in 10 vibrant colors (Burgundy Red, Rosy Red, Golden Yellow, Jewel Blue, Sky Blue, Black, Silver, Emerald, Dark Purple, Brownish Orange), they offer a lightweight, corrosion‑resistant, and stylish fastening solution. The flat knurled head (10mm diameter) provides a secure, non‑slip grip for hand tightening and loosening – no tools required. Fully threaded with M3 coarse pitch (0.5mm), and available in thread lengths from 5mm to 50mm (measured under the head). Perfect for PC computer cases, camera tripod mounts, machine racks, brackets, toys, RC models, and general DIY.
✨ Why These Anodized Aluminum Thumb Screws Are a Maker's Favorite
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High‑quality 6061 aluminum alloy – Lightweight, strong, and corrosion‑resistant. Anodized finish adds durability and vibrant color.
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10 anodized colors available – Choose from Burgundy Red, Rosy Red, Golden Yellow, Jewel Blue, Sky Blue, Black, Silver, Emerald, Dark Purple, and Brownish Orange to match your build.
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Knurled head for tool‑less grip – Diamond knurled surface provides excellent finger traction for hand tightening and loosening – no screwdriver needed.
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Flat head design (10mm diameter) – Low‑profile, wide bearing surface distributes clamping force and offers comfortable hand grip.
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M3 metric thread – fully threaded – Standard coarse pitch (0.5mm). Threads run the entire length for maximum grip.
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Wide thread length range: 5mm to 50mm – Available in multiple lengths to suit thin panels or thick assemblies. Select your desired length from the options.
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Versatile applications – PC computer cases, camera tripod mounts, machine racks, brackets, toy RC models, 3D printers, and DIY projects.
📏 Technical Specifications – M3 Knurled Thumb Screws (5‑Pack)
| Specification |
Details |
| Product Type |
Flat Knurled Thumb Screws (Hand Grip Bolts) |
| Material |
6061 Aluminum Alloy (anodized) |
| Thread Size |
M3 |
| Thread Pitch |
0.5mm (metric coarse) |
| Knurled Head Diameter |
10mm |
| Thread Length Range (under head) |
5mm – 50mm (select from options) |
| Head Style |
Flat, diamond knurled surface |
| Drive Style |
Hand grip (toolless) |
| Available Colors (10) |
Burgundy Red, Rosy Red, Golden Yellow, Jewel Blue, Sky Blue, Black, Silver, Emerald, Dark Purple, Brownish Orange |
| Quantity per Pack |
5 pieces |
❓ FAQs – M3 Aluminum Knurled Thumb Screws
🔸 What are the typical applications for these M3 thumb screws?
They are ideal for PC computer case side panels, camera tripod quick‑release plates, machine rack mounts, brackets, RC model body mounts, 3D printer bed leveling knobs, and any electronics enclosure where tool‑less access is desired.
🔸 How is thread length measured? Which length should I choose?
Thread length is measured from the underside of the flat head to the tip. For PC case panels (1‑2mm thick), a 5‑8mm length works. For thicker parts like camera brackets, 10‑15mm is common. Measure your material thickness and add 2‑3mm for proper engagement.
🔸 Will the anodized color wear off over time?
Anodizing is an electrochemical process that creates a durable oxide layer bonded to the aluminum. It will not peel or fade under normal use. Heavy abrasion may wear the finish, but typical hand tightening will keep the color vibrant for years.
🔸 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 designed for hand grip only – do not use tools on the knurling.
🔸 What colors are available? Can I mix colors in one pack?
We offer 10 colors (listed above). Please select your preferred single color from the dropdown options – this listing is for 5 screws of the same color per pack. If you need mixed colors, please contact us for a custom order.
🔸 Are these screws magnetic? Will they affect sensitive electronics?
Aluminum is non‑magnetic, so these thumb screws will not interfere with sensitive electronics, hard drives, or magnetic sensors. They are completely safe for use inside computers and near camera equipment.
