M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel
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M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon SteelM1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel

M1 M1.2 M1.4 M1.7 M2 M2.3 M2.6 M3 Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel

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$6.02 USD
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Description

🔩 Mini Flat Countersunk Self‑Tapping Screws – Black Zinc Carbon Steel (M1–M3)

When your project demands a slim, flush‑fitting fastener that won’t catch or protrude, these black zinc flat head self‑tapping screws are the ideal choice. The 90° countersink sits perfectly flush in sheet metal, plastic, wood, and thin composite panels – giving your work a clean, professional look. Fabricated from hardened carbon steel and finished in a matte black zinc plating, they offer reliable corrosion resistance for indoor electronics, hobby models, automotive trim, and furniture assembly. The sharp, full‑thread self‑tapping point cuts its own mating thread as you drive, eliminating the need for pre‑tapped holes or nuts in most thin materials. Covering the complete micro‑range from M1 to M3, with lengths from 3 mm to 25 mm, you can tackle everything from eyeglass repair and circuit boards to RC vehicles and small enclosures.

⚙️ Key Features – Black Zinc Flat Countersunk Self‑Tapping Screws

  • Carbon steel with black zinc plating offers a low‑profile dark finish and moderate corrosion resistance for indoor and light‑duty outdoor use
  • 90° flat countersunk head sits flush with the surface – no snagging, no interference, and a neat appearance
  • Self‑tapping thread cuts into sheet metal, plastic, wood, and composites without a pilot hole in most thin‑gauge materials
  • Phillips recess provides a stable, cam‑out‑resistant drive with standard precision screwdrivers
  • Eight precise metric diameters: M1, M1.2, M1.4, M1.7, M2, M2.3, M2.6, M3 – a size for every micro‑assembly and small‑scale job
  • Lengths measured, including the head (overall length), for accurate sizing
  • Ideal for electronics, eyeglass repair, RC models, small appliances, woodworking, and light automotive trim

📋 Technical Specifications – Black Countersunk Self‑Tapping Screws

Thread Size Thread Diameter (d) Pitch (p) Head Diameter (dk) Head Thickness (k) Available Lengths (mm)* Head Style Drive Material & Finish
M1 1.0 mm — 1.75 mm 0.65 mm 3 – 8 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M1.2 1.2 mm — 1.82 mm 0.7 mm 3 – 10 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M1.4 1.4 mm 0.5 mm 2.50 mm 0.8 mm 3 – 12 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M1.7 1.7 mm 0.5 mm 3.27 mm 1.13 mm 4 – 16 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M2 2.0 mm 0.6 mm 3.70 mm 1.21 mm 4 – 20 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M2.3 2.3 mm — — — 5 – 25 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M2.6 2.6 mm 0.9 mm 4.20 mm 1.6 mm 6 – 25 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc
M3 3.0 mm 1.1 mm 5.30 mm 2.0 mm 6 – 25 Flat 90° Countersunk Phillips Carbon Steel, Black Zinc

* Lengths are overall length (including the head). Dimensional data for M2.3 is approximate; refer to product images for exact values. All dimensions conform to GB/T equivalent standards.

❓ Frequently Asked Questions – Mini Flat Self‑Tapping Screws

🔸 Will the black zinc finish rust or wear off?

Black zinc provides good corrosion protection for indoor and light outdoor use. It won’t peel like paint and holds up well under normal humidity. For constant wet environments, stainless steel would be a better choice, but for electronics, hobbies, and indoor furniture, the black zinc finish stays clean and discreet.

🔸 Do I need a pilot hole for these tiny screws?

In very thin sheet metal (up to about 0.8 mm) and soft plastics, you can often drive them directly. For thicker materials or to avoid cracking in brittle plastics, a small pilot hole – roughly 80% of the thread diameter – is recommended. This also reduces the risk of snapping the smallest M1–M1.4 sizes.

🔸 Are the lengths measured from the top of the head?

Yes. All listed lengths are overall length – from the top of the flat countersunk head to the tip. This means the screw will not protrude beyond your workpiece if you match the length to the material thickness.

🔸 Which Phillips bit should I use for these micro screws?

The smallest screws (M1–M1.4) require a #000 or #00 Phillips precision bit. M1.7–M2 use #0, and M2.3–M3 use #0 or #1. A quality precision screwdriver set with these micro bits will give the best results and prevent cam‑out.

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