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When you need a fastener you can tighten and release by hand — without hunting for a screwdriver — standard bolts slow you down. These aluminum alloy knurled thumb screws are built for makers, technicians, and DIYers who need quick, repeatable access to panels, enclosures, jigs, and equipment covers.
Each screw features a round, knurled aluminum alloy handle for a firm finger grip, paired with a stainless steel or aluminum threaded shank. Handle diameters range from 12 mm to 20 mm (approx. 0.47"–0.79") and heights from 11 mm to 20 mm (approx. 0.43"–0.79"). Thread diameter is M5 across all variants; shaft lengths run from 8 mm to 30 mm (approx. 0.31"–1.18"). Available in Silvery, Black, Red, Blue, Golden, Purple, and Green anodized finishes.
Ideal for tool-free panel fastening on 3D printer frames and enclosures, quick-release access covers on electronic enclosures and control boxes, and adjustable clamping fixtures on woodworking jigs and CNC spoilboards where frequent repositioning is needed.
| Material — Handle | Aluminum Alloy (Anodized) |
|---|---|
| Material — Shank | See variant options |
| Thread Diameter | M5 |
| Shaft Length Range | 8 mm / 10 mm / 12 mm / 15 mm / 20 mm / 25 mm / 30 mm |
| Handle Diameter Range | 12 mm – 20 mm (approx. 0.47" – 0.79") |
| Handle Height Range | 11 mm – 20 mm (approx. 0.43" – 0.79") |
| Head Style | Round Knob |
| Drive Style | Hand / Thumb (no tool required) |
| Color / Finish | Silvery, Black, Red, Blue, Golden, Purple, Green |
| System of Measurement | Metric |
| Quantity per Order | See variant options |
| Weight | See variant options |
Choose based on the clearance around your fastening point and how much grip surface you need. Larger diameter handles (D20) give more torque leverage for tighter clamping; smaller handles (D12) fit in tighter spaces. Handle height affects how far the knob protrudes above the surface — select a height that clears any surrounding components.
Measure the total thickness of the material(s) being fastened, then add the engagement depth of your threaded insert or nut (typically 5–8 mm for M5). Choose the next shaft length up from that total. For example, fastening a 5 mm panel into a 6 mm deep insert requires at least 11 mm of shaft — select the 12 mm option.
These fasteners are designed for hand-tightened, non-structural applications such as panel retention, access covers, and adjustable fixtures. They are not rated for high-vibration or load-bearing structural joints. For applications requiring specific torque or shear ratings, consult the variant specifications or contact us to confirm suitability.
The anodized aluminum handle provides good resistance to surface oxidation and light abrasion under normal indoor use conditions. Anodizing is an integral part of the aluminum surface rather than a coating, so it will not peel. Avoid prolonged exposure to strong acids, alkalis, or salt spray environments, which can degrade the anodized layer over time.
Yes. The M5 metric thread is compatible with standard M5 hex nuts, M5 threaded inserts (brass, steel, or heat-set), and any M5-tapped hole. Verify that the thread pitch is standard M5 × 0.8 mm, which is the most common M5 pitch used in DIY and industrial applications.
The anodized aluminum handle offers moderate moisture resistance for occasional outdoor or humid-environment use. For continuous outdoor exposure or wet environments, consider applying a light protective coating to the shank threads. Contact us to confirm shank material for your selected variant if corrosion resistance is a primary concern.
The color difference is purely the anodized finish on the aluminum handle. All colors share the same dimensions, thread specification, and mechanical properties for a given size variant. Color-coding can be useful for identifying different fastener sizes or access points on a build at a glance.
