🔩 Product Overview: M2/M2.5 Thumb Screws – Flared Shoulder, Knurled Head, Stainless Steel
For small electronics, camera gear, or 3D printers where you need a tool‑less fastener with a secure grip, these M2 and M2.5 stainless steel thumb screws with a flared shoulder and knurled head are a perfect solution. The knurled barrel head provides excellent finger grip for hand tightening, while the flared shoulder acts as a built‑in washer, distributing clamping force and preventing the screw from pulling through soft materials like plastic or thin sheet metal. Made from corrosion‑resistant stainless steel, they are strong, non‑magnetic, and durable. Available in M2 and M2.5 thread diameters, with thread lengths from 3mm to 12mm (measured under the head). Ideal for panel mounting, electronic enclosures, camera rigs, and any application where you need to frequently adjust or remove fasteners by hand.
✨ Why These Mini Thumb Screws Are a Handy Addition to Your Kit
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Knurled head for tool‑less operation – The diamond knurl pattern gives you a secure, slip‑resistant grip for hand tightening and loosening – no screwdriver needed.
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Flared shoulder (built‑in washer) – The wider shoulder acts as an integrated washer, distributing clamping force and protecting soft surfaces from damage.
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Stainless steel construction – Corrosion‑resistant, non‑magnetic, and strong. Suitable for indoor and light outdoor use.
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Tiny metric sizes M2 and M2.5 – Perfect for small electronics, camera accessories, 3D printer components, and miniature panels.
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Fully threaded, coarse metric pitch – Standard threads: M2x0.4, M2.5x0.45. Threads run the entire length for maximum grip.
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Thread lengths from 3mm to 12mm (under head) – Choose from 3, 4, 5, 6, 8, 10, 12mm. Ideal for thin panels and compact assemblies.
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Wide applications – Electronics enclosures, camera rigs, 3D printer bed leveling knobs, RC car body mounts, instrument panels, and DIY projects.
📏 Technical Specifications – Flared Shoulder Knurled Thumb Screws (M2/M2.5)
| Specification |
M2 |
M2.5 |
| Thread Diameter (d) |
2mm |
2.5mm |
| Thread Pitch (p) |
0.4mm |
0.45mm |
| Thread Length Range (under head) |
3,4,5,6,8,10,12mm |
3,4,5,6,8,10,12mm |
| Head Style |
Knurled cylindrical barrel head |
| Shoulder Type |
Flared shoulder (integrated washer) |
| Drive Style |
Hand grip (tool‑less) |
| Material |
Stainless steel |
| Thread Type |
Fully threaded, coarse metric |
| Length Measurement |
Under head – from underside of shoulder to tip (head not included) |
❓ FAQs – Mini Flared Shoulder Thumb Screws
🔸 What is the purpose of the flared shoulder?
The flared shoulder acts as an integrated flat washer. It spreads the clamping force over a larger area, preventing the screw head from pulling through soft materials like plastic, thin sheet metal, or wood. It also protects the surface from marring and eliminates the need for a separate washer.
🔸 How is the thread length measured for these thumb screws?
Thread length is measured from the underside of the flared shoulder to the tip of the thread. The knurled head and shoulder are not included. For example, an M2.5 x 10mm screw has a 10mm long threaded shank.
🔸 Are these screws fully threaded? What are the thread pitches?
Yes – they are fully threaded from under the shoulder to the tip. M2 has 0.4mm pitch, M2.5 has 0.45mm pitch – standard metric coarse.
🔸 Will stainless steel rust?
Stainless steel is highly resistant to corrosion and will not rust under normal indoor and light outdoor use. For continuous saltwater or heavy chemical exposure, a higher grade (e.g., 316) would be better, but for electronics and general hardware, this is excellent.
🔸 Can I use these screws with nuts, or are they for tapped holes only?
These are standard machine screws – they work with matching metric nuts (M2 or M2.5) or in pre‑tapped holes. The flared shoulder replaces a washer on the screw side. For through‑hole applications, use a nut on the back side.
🔸 What lengths are available for M2 and M2.5?
We offer thread lengths of 3, 4, 5, 6, 8, 10, and 12mm for both M2 and M2.5. Please select your desired length from the dropdown options. If you need a specific length not listed, contact us.
