🔩 M10 & M12 Countersunk Torx Machine Screws – A2 Stainless Steel, DIN 965, Fully Threaded (16–100mm Overall Length)
You’re bolting down heavy machinery, securing a steel frame, or installing outdoor equipment – and you need screws that sit flush, resist rust, and won’t cam‑out under high torque. These M10 and M12 countersunk screws feature a Torx (star) drive, which eliminates slipping and allows you to apply serious torque without damaging the recess. Made from A2 stainless steel (304), they offer excellent corrosion resistance for outdoor, marine, and industrial environments. The 90° flat head sinks flush into a pre‑drilled countersink, leaving a smooth, snag‑free surface. Fully threaded, with length measured overall including the head. Available in M10 and M12 diameters, lengths from 16mm to 100mm. Perfect for heavy‑duty fastening in construction, shipbuilding, and industrial machinery.
✨ Key Features – M10 & M12 Countersunk Torx Screws (DIN 965)
- ⭐ Torx (six‑lobe) drive – No cam‑out, even at high torque. Perfect for power tools and heavy‑duty applications.
- 🔽 Countersunk flat head (90°) – Sits flush with the surface after proper countersinking. Smooth, professional finish.
- 🛡️ A2 stainless steel (304) – Excellent corrosion resistance, oxidation resistance, and heat resistance. Strong and durable.
- 📏 M10 and M12 metric threads – Heavy‑duty sizes for structural fastening, marine hardware, and industrial equipment.
- 📐 Overall length includes head (16–100mm) – Example: M10 x 40mm means total length from top of head to tip is 40mm. Fully threaded.
- ⚙️ DIN 965 standard – German industrial standard ensures consistent head dimensions, countersink angle, and thread quality.
- 🔧 Widely used – Machinery, steel structures, shipbuilding, heavy equipment, and outdoor installations.
📏 Specifications – M10 & M12 Countersunk Torx Screws (A2 Stainless)
| Thread Diameter (M) |
Thread Pitch (mm) |
Overall Length Range (mm, including head) * |
Head Style |
Drive |
Torx Bit Size (approx.) |
Material |
| 📐 Overall length = from top of head to tip. Fully threaded. Select exact size from dropdown. |
| M10 |
1.5 |
16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 |
Countersunk (90°)
|
Torx (six‑lobe)
|
T40 or T45 |
A2 304 Stainless
|
| M12 |
1.75 |
16, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 |
T45 or T50 |
* Lengths are typical – exact availability may vary. Please allow minor manual measurement errors. Torx bit sizes are approximate – always check fit.
📋 Why DIN 965 Torx Countersunk Screws?
| Feature |
Benefit |
| Torx drive |
Eliminates cam‑out – ideal for high‑torque power tool installation. Reduces driver wear. |
| Countersunk head |
Flush fit prevents snagging, improves safety, and provides a clean appearance. |
| A2 stainless steel |
Corrosion resistant for outdoor, marine, and industrial environments. 18‑8 chemistry (may be mildly magnetic). |
| DIN 965 |
Precision dimensions, consistent quality, and reliable countersink angle. |
❓ Frequently Asked Questions – M10/M12 Countersunk Torx Screws
1. How do I measure the length of a countersunk Torx screw?
For DIN 965 countersunk screws, the length is measured overall – from the top of the head to the tip. So an “M10 x 40mm” screw has a total length of 40mm 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 or slightly recessed finish, you must drill a matching 90° countersink hole. Use a countersink bit sized for the screw head.
3. Are these screws fully threaded? What about longer lengths like 100mm?
Yes – all M10 and M12 screws in this range (up to 100mm) are fully threaded from under the head to the tip, giving you maximum grip in blind holes or through‑nut applications.
4. Can I use these screws outdoors or in saltwater?
A2 stainless (304) is highly corrosion‑resistant and suitable for most outdoor environments, including rain, humidity, and coastal air. For continuous saltwater immersion, we recommend A4 (316) stainless. For above‑water marine hardware, A2 is excellent and will not rust.
5. What Torx bit size do I need for M10 and M12 screws?
M10 typically uses a T40 or T45 Torx bit; M12 uses T45 or T50. Always use a quality bit that fits snugly to avoid stripping the recess.
6. Can I use these screws with a nut? What size nut fits?
Yes – these are machine screws. Use standard metric nuts of the same thread size (M10 or M12) and pitch. For outdoor use, pair with stainless steel nuts.
