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Fasten metal roofing, wall cladding, and steel framing in a single step with these M5.2 hex head self‑drilling screws. The hardened drill‑bit tip punches through sheet metal without a pilot hole, while the sharp thread taps a tight, vibration‑resistant hold. A wide hex flange head provides a solid bearing surface that resists pull‑through and accepts a standard socket for high‑torque driving — no cam‑out, no stripped heads. Zinc‑plated carbon steel construction delivers dependable corrosion protection for outdoor structures, making these screws a reliable choice for roofing, siding, carports, and light‑gauge steel connections. Available in thread lengths from 19 mm to 125 mm, the M5.2 diameter is ideal for fixing corrugated iron, composite panels, purlins, and heavy‑gauge brackets.
| Size | Thread Diameter (d) | Hexagon Diameter (ds) | Washer Diameter (s) | Head Thickness (k) | Available Lengths (mm)* | Head Style | Material & Finish |
|---|---|---|---|---|---|---|---|
| M5.2 | 5.2 mm | 7.6 mm | 11.9 mm | 5.3 mm | 19, 25, 32, 38, 50, 75, 100, 125 | Hex Flange Head | Carbon Steel, Zinc Plated |
* Lengths are thread length only (measured from under the head). Additional diameters (M4.2, M4.8, M5.5, M6.3) and lengths may be available — please check the listing or contact us for options.
No. The self‑drilling tip is designed to penetrate sheet metal up to about 2 mm thick without pre‑drilling. Simply place the screw against the metal and drive — it will bore its own hole and form its own thread in one step.
The M5.2 hex flange head typically uses a 10 mm (or 3/8″) socket. A magnetic nut driver bit greatly speeds up installation and helps the screw stay on the bit while positioning.
Zinc plating provides excellent corrosion protection for outdoor use. It forms a sacrificial layer that corrodes before the steel does, so your screws will stand up to rain, sun, and general weathering. For constant saltwater exposure, stainless steel would be a better choice, but for roofing and general construction, zinc‑plated carbon steel is the standard.
Length is measured from under the head (thread length only). This makes it easy to match the screw to your material thickness without including the head height.
