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When you need a fastener that sits completely flush with the surface, these flat-head self‑tapping screws with a flat tail deliver a clean, professional finish every time. The 90° countersunk head disappears into sheet metal, plastic, and wood, leaving nothing to snag or protrude — ideal for electronic enclosures, appliance panels, automotive trim, and structural connections where a smooth surface is critical. Fabricated from high‑strength carbon steel with a bright nickel plating, each screw provides reliable corrosion resistance indoors and in mild environments without flaking or peeling. The flat tail design is engineered for pre‑drilled or punched holes, where the sharp self‑tapping thread then cuts its own precise mating thread for a secure, vibration‑proof hold. Covering the complete micro‑ to small‑scale range — M1, M1.2, M1.4, M1.7, M2, M2.3, M2.6, M3, M3.5, and M4 — this series gives you the exact size for precision electronics, steel frame connections, heavy‑duty crane beams, and industrial building assemblies.
| Size | Thread Diameter | Typical Lengths (mm)* | Head Style | Tail Type | Drive | Material & Finish |
|---|---|---|---|---|---|---|
| M1 | 1.0 mm | 3 – 6 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M1.2 | 1.2 mm | 3 – 8 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M1.4 | 1.4 mm | 3 – 10 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M1.7 | 1.7 mm | 4 – 12 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M2 | 2.0 mm | 4 – 16 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M2.3 | 2.3 mm | 5 – 20 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M2.6 | 2.6 mm | 6 – 25 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M3 | 3.0 mm | 6 – 30 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M3.5 | 3.5 mm | 8 – 35 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
| M4 | 4.0 mm | 8 – 40 | Flat 90° Countersunk | Flat (Blunt) | Phillips | Carbon Steel, Nickel Plated |
* Lengths are measured overall (including the flat head). All screws feature a flat tail point and require a pre‑drilled or punched hole. Exact length options vary per size — select from the listing.
Yes. A flat tail (blunt point) screw requires a pre‑drilled or punched hole of the proper diameter. The screw then taps its own precise thread into the material. This design gives you stronger, more controlled thread engagement and is preferred in structural steel connections where thread quality is critical.
Absolutely. The high‑strength carbon steel and flat tail design are specifically suited for steel frame beam‑column connections, solid web beam assemblies, and even heavy‑duty crane beam brake systems in industrial buildings. Ensure the hole size matches the screw diameter for optimal performance.
Nickel plating provides excellent corrosion resistance in indoor and mild outdoor environments. It won't peel like paint and maintains a bright, clean appearance. For constant damp or outdoor exposure, stainless steel would be the next step up, but for electronics, automotive, and industrial interior applications, nickel holds up very well.
Yes. All listed lengths are overall length, from the top of the countersunk head to the tip. This makes it easy to match the screw to your total material thickness without the head protruding above the surface.
