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When a standard Phillips drive won’t cut it, these Allen‑drive pan head self‑tapping screws give you the control and torque you need. Machined from genuine A2 / 304 stainless steel, they stand up to moisture, humidity, and outdoor exposure without a surface coating that wears thin. The internal hex drive lets you tighten with confidence — less cam‑out, more force — perfect for tight spots where a driver can slip. The sharp self‑tapping thread cuts its own path into sheet metal, plastic, wood, and composites, so there’s no need for separate nuts or tapped holes. Available in the four most popular diameters (M3, M4, M5, M6) and lengths from 6 mm to 40 mm, this series covers everything from electronics brackets to structural metalwork.
| Size | Thread Diameter | Available Lengths (mm)* | Head Style | Drive | Material |
|---|---|---|---|---|---|
| M3 | 3.0 mm | 6, 8, 10, 12, 16, 20 | Pan Head | Hex (Allen) 2 mm | 304 Stainless |
| M4 | 4.0 mm | 10, 12, 16, 20, 25, 30 | Pan Head | Hex (Allen) 2.5 mm | 304 Stainless |
| M5 | 5.0 mm | 16, 20, 25, 30, 35, 40 | Pan Head | Hex (Allen) 3 mm | 304 Stainless |
| M6 | 6.0 mm | 16, 20, 25, 30, 35, 40 | Pan Head | Hex (Allen) 4 mm | 304 Stainless |
* Lengths are thread length only (not including head). Full‑thread design. All sizes metric coarse thread.
In thin sheet metal up to about 1 mm and most plastics, yes. The sharp thread will form its own path. For thicker metals or hardwoods, a small pilot hole (about 80% of the screw diameter) will reduce driving torque and give you a perfect thread.
M3 uses a 2 mm hex key, M4 uses 2.5 mm, M5 uses 3 mm, and M6 uses a 4 mm hex key. A standard metric hex set will cover all sizes.
Absolutely. 304 stainless resists rust in rain, humidity, and mild chemicals. For constant saltwater exposure, 316 is better, but for outdoor furniture, automotive trim, and general workshop use, 304 lasts for years without red rust.
Yes, all listed lengths are the thread length only. For example, an M4×20 screw has 20 mm of thread below the pan head.
