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When your fastening job demands a flush, snag‑free surface, these countersunk self‑tapping screws deliver. Stamped from durable carbon steel and finished in a sleek black zinc plating, they offer reliable corrosion resistance for indoor and light‑duty outdoor use – electronics, furniture, automotive interior trim, and appliance panels all benefit from the dark, low‑profile finish. The 90° blunt‑end flat head sits perfectly flush in standard countersinks, while the sharp metric coarse thread cuts its own path into sheet metal, plastic, fiberglass, and wood – no separate tap or pilot hole required in most thin materials. Designed with a Pozi‑compatible Phillips recess for a secure, slip‑resistant drive, these screws make installation faster and cleaner. With thread diameters from M1.4 up to M4 and multiple length options (including head), you can match the exact material thickness across a wide range of precision assembly and general workshop tasks.
| Thread Ø (d) | Head Ø (dk) | Head Thickness (k) | Typical Lengths (mm)* | Head Style | Drive | Material & Finish |
|---|---|---|---|---|---|---|
| M1.4 | 2.6 mm | 0.7 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M1.7 | 3.2 mm | 0.9 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M2 | 3.6 mm | 1.1 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M2.3 | 3.7 mm | 1.2 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M2.6 | 4.1 mm | 1.3 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M3 | 5.1 mm | 1.5 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M3.5 | 6.5 mm | 1.9 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
| M4 | 6.7 mm | 2.1 mm | Various (see listing) | Countersunk Flat | Phillips (Pozi‑comp.) | Carbon Steel, Black Zinc |
* Lengths are overall length (including head). Exact length options vary by size – refer to the listing drop‑down for availability. Dimensions conform to metric standards.
They feature a standard Phillips recess that works with both Phillips and Pozi bits. While labeled as Pozi by some sources, the drive is Phillips‑compatible. A #0, #1, or #2 Phillips bit will fit perfectly, depending on the screw size.
In thin sheet metal (up to about 1 mm) or soft plastic, you can often drive them directly without a pilot hole. For thicker materials, a small pilot hole about 80% of the thread diameter reduces torque and ensures a clean, strong thread.
Black zinc plating provides moderate corrosion protection. It resists rust in indoor and dry environments very well. For outdoor or wet conditions, occasional maintenance or a protective coating is recommended, as prolonged moisture can cause surface staining over time.
All length measurements for these screws are overall length – from the very top of the flat head to the tip. Unlike some pan head screws that list only the thread length, these are measured including the head, so you can match them directly to your material thickness.
