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You’re repairing a pair of eyeglasses, mounting a small PCB, or assembling a miniature hinge – and you need tiny screws that sit perfectly flush. These M1.2 to M4 countersunk machine screws are made from nickel‑plated carbon steel, giving you a bright, corrosion‑resistant finish at an affordable price. The 90° flat head sinks into a pre‑drilled countersink, leaving a smooth surface that won’t snag. Phillips drive works with standard crosshead screwdrivers. Available in thread diameters from M1.2 up to M4, with lengths from 3mm to 12mm (overall length including the head). Perfect for electronics, model making, instrument repair, and any project where a flush, professional look matters.
| Thread Diameter | Available Lengths (mm) * | Thread Pitch (mm) | Typical Applications |
|---|---|---|---|
| M1.2 | 3, 4, 5, 6, 8, 10, 12 | 0.25 | Eyeglasses, tiny hinges, microelectronics |
| M1.4 | 3, 4, 5, 6, 8, 10, 12 | 0.3 | Small cameras, RC cars, |
| M1.6 | 3, 4, 5, 6, 8, 10, 12 | 0.35 | Laptop hinges, small brackets, hobby projects |
| M1.7 | 3, 4, 5, 6, 8, 10, 12 | 0.35 | Specialty electronics, German precision equipment |
| M2 | 3, 4, 5, 6, 8, 10, 12 | 0.4 | PCBs, 3D printer parts, toys |
| M2.5 | 3, 4, 5, 6, 8, 10, 12 | 0.45 | Small appliances, radio control servos |
| M3 | 3, 4, 5, 6, 8, 10, 12 | 0.5 | Electronics enclosures, furniture hinges, DIY projects |
| M3.5 | 3, 4, 5, 6, 8, 10, 12 | 0.6 | Audio equipment, older European devices |
| M4 | 3, 4, 5, 6, 8, 10, 12 | 0.7 | Small machinery, automotive trim, light assembly |
* Length is measured overall, including the head (top of head to tip). All screws are fully threaded.
| Parameter | Details |
|---|---|
| Product name | Countersunk Machine Screws – Phillips drive, flat head |
| Material | Carbon steel, nickel plated |
| Head style | Countersunk / Flat (90° cone) |
| Drive style | Phillips (cross recess) – also accepts Pozidriv bits with care |
| Thread standard | Metric coarse – fully threaded |
| Length range | 3mm – 12mm (overall, head included) |
| Thread diameters | M1.2, M1.4, M1.6, M1.7, M2, M2.5, M3, M3.5, M4 |
| Corrosion resistance | Good – nickel plating protects against indoor humidity and light moisture |
| Typical applications | Electronics, model making, instrument repair, eyewear, small appliances |
1. Do I need to countersink the hole for these screws to sit flush?
Yes – for the head to be perfectly flush with the surface, you must drill a matching 90° countersink hole. If you drive them into a straight hole, the head will sit proud. Use a countersink bit slightly larger than the screw head diameter. For soft wood or plastic, you can sometimes tap the head in with a hammer, but proper countersinking gives a much cleaner result.
2. How is the length measured for these countersunk screws?
For countersunk screws, the overall length includes the head. Place the screw on a ruler with the top of the head flat against the zero mark – measure to the tip. So an “M3 x 8mm” screw has a total length of 8mm from the top of the head to the tip.
3. Are these screws suitable for outdoor use? Will the nickel plating rust?
Nickel plating provides good protection for indoor use and occasional moisture, but it is not fully waterproof. For continuous outdoor exposure, we recommend stainless steel screws. These are perfect for electronics, model making, and indoor furniture – avoid constant rain or high humidity.
4. Can I use these screws with a nut, or do they need a tapped hole?
Both. These are machine screws, so they are designed to go into pre‑tapped holes of the same metric size, or to be used with a matching metric nut (e.g., M3 nut for an M3 screw). They are not self‑tapping. For wood or soft plastic, drill a pilot hole and use a threaded insert or nut on the back.
5. What Phillips screwdriver size should I use for these tiny screws?
For M1.2 to M2, use a #000 or #00 Phillips screwdriver. For M2.5 to M3, a #0 works well. For M3.5 and M4, a #1 Phillips is appropriate. Using a driver that is too large will damage the cross recess. Precision screwdriver sets usually include these small sizes.
6. Why does the title say both “Phillips” and “Pozi”? Which drive is it?
These screws have a standard Phillips cross recess. They will work with Pozidriv bits in a pinch, but the fit is not perfect. For best results, use a genuine Phillips driver. The listing mentions both terms for search visibility, but the actual drive is Phillips.
