🔘 M3 x 20mm Aluminum Alloy Knurled Thumb Screw – Hand Grip Knob Bolt, Anodised Finish

You need a reliable, lightweight thumb screw for a quick‑release panel, a jig, or a piece of test equipment – and you don’t want to search for a screwdriver every time. This M3 x 20mm knurled thumb screw gives you a comfortable, diamond‑knurled aluminium head that you can tighten and loosen by hand. Made from 6061 aluminium alloy with an anodised finish, it’s corrosion‑resistant, non‑magnetic, and much lighter than steel. The 20mm thread length (under head) is fully threaded, providing a secure hold in tapped holes or with a matching M3 nut. Ideal for machinery, precision moulds, bearing assemblies, and any DIY application where tool‑less adjustment is a bonus.

✨ Key Features – M3 x 20mm Knurled Aluminium Thumb Screw

• 🔘 Knurled round head – Diamond pattern provides excellent fingertip grip, even with oily or gloved hands.
• ⚖️ Lightweight 6061 aluminium alloy – About 1/3 the weight of steel. Non‑magnetic and thermally conductive.
• 🎨 Anodised finish – Corrosion‑resistant, durable, and available in multiple colours (actual colour may vary slightly due to photography).
• 📐
  Tool‑less operation – No screwdrivers, hex keys, or wrenches needed. Perfect for frequent adjustments.
• 📏 M3 metric thread (3mm diameter, 0.5mm pitch) – One of the most common sizes for electronics, machinery, and DIY.
• 📐 20mm thread length (under head) – Fully threaded from under the head to the tip for maximum grip in blind holes or with a nut.
• 🔧 Widely used – Machinery, precision moulds, bearing assembly, 3D printers, camera rigs, and workshop fixtures.

📏 Specifications – M3 x 20mm Knurled Thumb Screw

🛠️ Typical Applications for M3 Thumb Screws

❓ Frequently Asked Questions – M3 Aluminium Thumb Screw