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You’re working on a stealth‑themed PC build, a black anodized drone frame, or a piece of outdoor furniture where dark hardware looks best. These M2 and M2.5 countersunk screws are made from A2 stainless steel with a black finish – so they resist rust while blending into dark surfaces. The flat, 90° head sinks flush into a pre‑drilled countersink, leaving a smooth, snag‑free finish. Phillips drive works with standard crosshead screwdrivers. Lengths are measured overall (including the head), and every screw is fully threaded for maximum grip. Available in M2 and M2.5 diameters, with lengths from 3mm to 60mm. Perfect for electronics enclosures, black‑finished furniture, marine hardware, and any project where a low‑profile, corrosion‑resistant dark screw is needed.
| Thread Diameter (M) | Thread Pitch (mm) | Head Diameter (dk) – max/min (mm) | Head Height (k) (mm) | Overall Length Range (mm, including head) * | Material / Finish |
|---|---|---|---|---|---|
| M2 | 0.4 | 3.8 – 3.5 | 1.3 | 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60 | A2 stainless steel / Black finish |
| M2.5 | 0.45 | 4.7 – 4.4 | 1.5 |
* Overall length = from top of head to tip. Fully threaded. Select exact length from dropdown. Head dimensions are based on standard countersunk head geometry (90°).
| Thread Size | Pitch (mm) | Head Diameter (mm) | Head Height (mm) | Material | Finish |
|---|---|---|---|---|---|
| M2 | 0.4 | 3.8 – 3.5 | 1.3 | A2 304 Stainless | Black |
| M2.5 | 0.45 | 4.7 – 4.4 | 1.5 | A2 304 Stainless | Black |
1. How do I measure the length of a countersunk screw?
For countersunk screws, length is measured overall – from the top of the head to the tip. So an “M2 x 10mm” screw has a total length of 10mm including the head. This matches our listing.
2. Do I need to countersink the hole for these screws to sit flush?
Yes – these are true 90° countersunk screws. To achieve a flush finish, drill a matching 90° countersink hole. Use a countersink bit slightly larger than the head diameter. In soft materials, you can gently tap the head in, but proper countersinking gives the best result.
3. Are these screws fully threaded?
Yes – all M2 and M2.5 screws in this range (up to 60mm overall length) are fully threaded from under the head to the tip, giving you maximum grip.
4. Will the black finish wear off? Will the screws rust if it does?
The black coating is durable but can scratch under heavy use. However, the base material is A2 stainless steel – even if the coating wears, the screw itself will not rust. This is a major advantage over black‑coated carbon steel screws.
5. Can I use these screws outdoors?
Absolutely. A2 stainless is highly corrosion‑resistant and works well outdoors, including coastal areas. The black coating adds extra protection. They are ideal for marine hardware, garden furniture, and outdoor electronics enclosures.
6. What Phillips screwdriver size do I need for M2 and M2.5?
Use a #000 or #00 Phillips screwdriver for M2, and a #0 for M2.5. Precision screwdriver sets include these small sizes. Always match the bit to avoid cam‑out.
