🔧 Product Overview: M2 & M3 Phillips Countersunk Flat Head Machine Screws (Carbon Steel)
If you're working on a project where screw heads need to sit completely flush with the surface – think laptop bottom panels, furniture assembly, or metalwork – these M2 and M3 Phillips countersunk flat head screws are exactly what you need. Made from carbon steel with a standard coarse thread, they're strong, reliable, and budget‑friendly. The flat 82° head sinks neatly into a countersunk hole, leaving a smooth, snag‑free finish. The Phillips drive works with common #0 or #1 bits, and the screws are fully threaded for maximum grip in thin materials. Available in various lengths, these Grade 4.8 bolts are a solid choice for everyday repairs, electronics, and DIY builds.
✨ Why These Countersunk Phillips Screws Deserve a Spot in Your Hardware Drawer
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Carbon steel construction – Strong and durable for most indoor fastening applications. Grade 4.8 strength is perfect for general use.
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Phillips drive with countersunk flat head – The cross recess centers your driver, and the 82° flat head sits flush in tapered holes for a professional, snag‑free finish.
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Metric sizes M2 and M3 – The most common small diameters for electronics, toys, appliances, and light machinery.
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Coarse metric thread, fully threaded – M2x0.4, M3x0.5 standard pitch. Threads run the entire shank length for maximum grip and easy nut engagement.
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Made in China to consistent standards – Reliable quality with precision head dimensions. See table below for exact specs.
📏 Technical Specifications – M2 & M3 Countersunk Phillips Screws (Carbon Steel)
| Specification |
M2 |
M3 |
| Thread Diameter (d) |
2mm |
3mm |
| Thread Pitch (p) |
0.4mm |
0.5mm |
| Head Diameter (dk) – max |
4.00mm |
5.50mm |
| Head Diameter (dk) – min |
3.60mm |
5.10mm |
| Head Height (k) – max |
1.20mm |
1.50mm |
| Head Height (k) – min |
1.00mm |
1.20mm |
| Phillips Driver Size |
#1 (PH1) |
#2 (PH2) |
| Material |
Carbon Steel (Grade 4.8) |
| Thread Type |
Fully threaded, coarse pitch |
| Length Range |
See product options (typical: 3–30mm) |
❓ FAQs – M2 & M3 Countersunk Flat Head Screws
🔸 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 screws). For example, an M3 x 8mm screw is 8mm long overall from the top of the flat head to the tip.
🔸 What Phillips screwdriver size do I need for M2 and M3?
For M2, use a PH0 or PH1 (PH1 is often fine). For M3, use a PH1 or PH2 – PH2 is common. A precision #1 Phillips driver works well for both sizes. Avoid using a worn or oversized bit to prevent stripping.
🔸 Will carbon steel screws rust?
Yes – carbon steel will rust if exposed to moisture. These screws are best for indoor, dry applications like electronics, furniture, and appliances. For outdoor or humid environments, we recommend stainless steel or coated fasteners.
🔸 Can I use these screws with nuts, or are they self‑tapping?
These are standard machine screws – they require a matching metric nut (M2 or M3) or a pre‑tapped hole. They are not self‑tapping. For best results, pair with steel nuts or use in threaded inserts.
🔸 What lengths are available for M2 and M3?
Lengths vary – please select from the dropdown options on the product page. Typical lengths for M2: 3–12mm; for M3: 4–30mm. If you need a specific length not listed, contact us.
🔸 Are these screws magnetic?
Yes – carbon steel is magnetic. For most indoor applications, that's not an issue. If you need non‑magnetic fasteners for sensitive electronics, consider brass or nylon.
