🎨 Product Overview: M2.5 Knurled Thumb Screws – Flat Head Grip Knob for Computer & Graphics Card (3–40mm)
Upgrade your PC build or electronics project with these colorful M2.5 knurled thumb screws. Featuring a flat, knurled head made from anodized aluminum (6061) for a secure, tool‑less grip, and a stainless steel threaded stud for strength and corrosion resistance. The flat head design allows for a low‑profile finish, making them perfect for securing computer graphics cards, chassis side panels, power supplies, hard drives, optical drives, network cards, and sound cards. Available in a wide range of anodized colors (Pink, Gold, Royal Blue, Sky Blue, Green, Purple, Orange) to match your custom build. Fully threaded with M2.5 coarse pitch (0.45mm), in lengths from 3mm to 40mm (measured under the head).
✨ Why These Colorful Knurled Thumb Screws Are a PC Modder's Favorite
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Tool‑less knurled grip – Diamond knurl pattern provides excellent finger grip for hand tightening and loosening – no screwdriver needed.
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Flat head design – Low‑profile head sits neatly on panels and components, reducing interference with other hardware.
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Dual‑material construction – Anodized aluminum 6061 head (lightweight, corrosion‑resistant) + stainless steel thread (strong, non‑rusting).
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Vibrant anodized colors – Choose from Pink, Gold, Royal Blue, Sky Blue, Green, Purple, or Orange to customize your PC build.
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M2.5 metric thread – fully threaded – Standard coarse pitch (0.45mm). Threads run the entire length for maximum grip.
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Lengths from 3mm to 40mm (under head) – Available in multiple lengths to suit different panel thicknesses and mounting depths.
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Wide PC applications – Computer case side panels, power supply mounting, hard drives, optical drives, graphics cards, network cards, sound cards, and general case modding.
📏 Technical Specifications – M2.5 Knurled Thumb Screws
| Specification |
Details |
| Thread Size |
M2.5 |
| Thread Pitch |
0.45mm (metric coarse) |
| Thread Length Range (under head) |
3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 25mm, 30mm, 35mm, 40mm (select from options) |
| Length Measurement |
Under head – from underside of flat head to tip (head not included) |
| Head Material |
Aluminum alloy 6061 (anodized) |
| Thread Material |
Stainless steel |
| Head Style |
Flat knurled head (low profile) |
| Available Colors |
Pink, Gold, Royal Blue, Sky Blue, Green, Purple, Orange (anodized) |
| Drive Style |
Hand grip (toolless) |
| Tolerance |
±0.1mm |
| Applications |
Computer case panels, graphics card brackets, power supplies, HDD/ODD, network cards, sound cards |
❓ FAQs – M2.5 Knurled Thumb Screws
🔸 What are the typical uses for M2.5 thumb screws in a computer?
M2.5 is a common size for securing graphics card brackets, case side panels, power supply mounts, hard drive caddies, optical drives, network cards, and sound cards. They provide a tool‑less solution for frequent access and modification.
🔸 How is thread length measured? Which length do I need?
Thread length is measured from the underside of the flat head to the tip. For PC case side panels (1‑2mm thick), a 4‑6mm length is usually sufficient. For graphics card brackets (thicker), 8‑12mm may be needed. Measure the thickness of the material you are fastening and add 2‑3mm for proper thread engagement.
🔸 Are these screws fully threaded? What is the thread pitch?
Yes – they are fully threaded from under the head to the tip. The pitch is standard M2.5 coarse: 0.45mm.
🔸 Will the anodized color wear off?
Anodizing is a durable electrochemical finish that bonds with the aluminum. It will not peel like paint. Under normal hand use, the color will remain vibrant for years. Heavy abrasion may wear the finish, but typical PC modifications will not cause significant wear.
🔸 Can I use these screws with nuts, or are they for threaded holes only?
These are standard machine screws – they work with matching M2.5 nuts or in pre‑tapped holes. Most PC cases and components have threaded holes, so nuts are typically not needed. For through‑hole applications, use an M2.5 nut on the back side.
🔸 What colors are available?
We offer Pink, Gold, Royal Blue, Sky Blue, Green, Purple, and Orange. Please select your preferred color from the dropdown options when ordering.
