🔩 Product Overview: M1–M4 Phillips Countersunk Head Machine Screws – Carbon Steel (Nickel or Black Zinc)
Working on precision electronics, small appliances, or miniature models? You need tiny screws that fit right, sink flush, and don't rust. These M1 to M4 Phillips countersunk flat head machine screws are made from carbon steel with your choice of nickel or black zinc plating – giving you strength, corrosion resistance, and a clean finish that blends with your project. The 82° flat head sits perfectly flush in countersunk holes, leaving a smooth, snag‑free surface. Available in micro sizes: M1, M1.2, M1.4, M1.6, M2, M3, and M4. Fully threaded with standard coarse pitch, they're ideal for precision machinery, instruments, electronics, locks, toys, and household appliances. Choose your plating and length – get the exact fastener you need.
✨ Why These Micro Countersunk Phillips Screws Are a Precision Essential
-
Carbon steel construction – High strength and durability. Offers good resistance to rust and corrosion in demanding environments, including high temperature.
-
Two plating options: nickel or black zinc – Nickel gives a bright silver finish that matches most hardware. Black zinc provides a dark, non‑reflective coating for stealthy assemblies.
-
Phillips countersunk flat head – Sits flush in tapered holes for a professional, snag‑free finish. Perfect for panel mounting and flush assemblies.
-
Wide micro size range: M1, M1.2, M1.4, M1.6, M2, M3, M4 – From the tiniest M1 for watches and medical devices up to M4 for small machinery and electronics.
-
Fully threaded, coarse metric pitch – Standard pitches: M1x0.25, M1.2x0.25, M1.4x0.3, M1.6x0.35, M2x0.4, M3x0.5, M4x0.7. Threads run the entire length.
-
Versatile applications – Precision machinery, classified instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, and more.
📏 Technical Specifications – M1–M4 Countersunk Phillips Screws (Carbon Steel)
| Specification |
Details |
| Product Type |
Phillips Countersunk Flat Head Machine Screws |
| Material |
Carbon steel |
| Available Finishes |
Nickel plated (bright silver) OR Black zinc plated (matte dark) – select option |
| Head Style |
Countersunk / Flat head (82°) |
| Drive Style |
Phillips cross‑head |
| System of Measurement |
Metric |
| Thread Sizes (Diameter) |
M1, M1.2, M1.4, M1.6, M2, M3, M4 |
| Thread Pitch (coarse) |
M1x0.25, M1.2x0.25, M1.4x0.3, M1.6x0.35, M2x0.4, M3x0.5, M4x0.7 |
| Thread Type |
Fully threaded |
| Length Measurement |
Length includes head (total screw length) – standard for countersunk screws |
| Length Range |
Varies by size – select from product options (typical lengths 2–30mm) |
❓ FAQs – Micro Countersunk Phillips Screws
🔸 What screwdriver size do I need for M1 to M4 countersunk screws?
M1–M1.6: use PH000. M2–M2.5: use PH00. M3–M4: use PH1. A precision screwdriver set with interchangeable bits is essential for these tiny sizes.
🔸 Are these screws fully threaded? How is length measured?
Yes – they are fully threaded from just under the head to the tip. Length is measured as total screw length including the head (standard for countersunk fasteners). For example, an M3 x 8mm screw is 8mm long overall from top of head to tip.
🔸 Which finish should I choose – nickel or black zinc?
Nickel offers a bright, silver appearance that matches most standard hardware – great for general indoor use and electronics. Black zinc gives a dark, non‑reflective finish that blends with black panels, automotive trim, or stealth builds. Both provide good corrosion resistance for indoor applications.
🔸 Can I use these screws outdoors?
Carbon steel with nickel or black zinc plating offers moderate corrosion resistance for indoor use and light outdoor exposure (sheltered areas). For constant moisture, rain, or coastal environments, we recommend stainless steel instead.
🔸 What lengths are available for each size?
Lengths vary by diameter. Please select from the dropdown options on the product page. Typical ranges: M1–M1.6: 2–8mm; M2–M3: 3–20mm; M4: 4–30mm. All lengths measured including head.
🔸 Are these screws magnetic?
Yes – carbon steel is magnetic. For most electronics and small appliances, that's not an issue. If you need non‑magnetic fasteners for sensitive instruments, choose brass or stainless steel.
