🔩 M1.6–M10 Slotted Pan Head Machine Screws – A2 Stainless Steel, Slot Drive for Classic & Restoration Projects
You’re restoring a vintage radio, repairing an old piece of machinery, or assembling a project where a traditional slotted drive is required. These M1.6 to M10 pan head screws are made from A2 stainless steel (304), offering excellent corrosion resistance, heat resistance, and high strength. The wide pan head provides a clean, low‑profile finish without needing a countersink, and the single slot works with any flathead screwdriver – no special bits needed. Fully threaded, with length measured under the head. Available in diameters M1.6, M2, M2.5, M3, M4, M5, M6, M8, and M10. Perfect for antique restorations, marine hardware, electronic enclosures, and general DIY where simplicity and rust resistance matter.
✨ Key Features – Slotted Pan Head Stainless Steel Screws
- 🔘 Pan head design (DIN 85 style) – Low profile, wide bearing surface. No countersinking needed – sits neatly on the material.
- 📏
Slotted drive – Classic single slot works with any flathead screwdriver. Ideal for restoration and low‑tech applications.
- 🛡️ A2 stainless steel (304) – Excellent corrosion resistance, weak acid/alkali resistance, heat and oxidation resistance. High tensile strength, good toughness, fatigue resistant.
- 📏 Wide metric range M1.6 to M10 – From micro screws for electronics up to medium‑duty for machinery and marine use.
- 📐 Fully threaded, length under head – Example: M4 x 10mm means thread diameter 4mm, length from under head to tip is 10mm. Fully threaded for maximum grip.
- ⚙️ Precision threads, clean finish – Smooth, burr‑free surface. Uniform pitch for even force distribution.
- 🔧 Versatile use – Antique restoration, marine hardware, electronic enclosures, furniture, machinery, and general DIY.
📏 Specifications – M1.6 to M10 Slotted Pan Head Screws (A2 Stainless)
| Thread Diameter (M) |
Thread Pitch (mm) |
Typical Lengths (mm, under head) * |
Head Style |
Drive |
Material |
| 📐 Length measured from underside of head to tip. Fully threaded. Select exact size from dropdown. |
| M1.6 |
0.35 |
3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80, 90, 100
(exact availability varies) |
Pan head (slotted) |
Slotted |
A2 304 Stainless Steel |
| M2 |
0.4 |
| M2.5 |
0.45 |
| M3 |
0.5 |
| M4 |
0.7 |
| M5 |
0.8 |
| M6 |
1.0 |
| M8 |
1.25 |
| M10 |
1.5 |
* Lengths are typical – exact availability may vary. Please refer to the attached parameter diagram. All values manually measured – minor errors possible.
📋 Why Choose A2 Stainless Steel Slotted Screws?
| Property |
Benefit |
| Corrosion resistance |
Excellent – resists rust in outdoor, humid, and coastal environments. Suitable for marine‑adjacent use. |
| Mechanical properties |
High tensile strength, good toughness, fatigue resistance. Ideal for dynamic loads and long‑term reliability. |
| Heat & oxidation resistance |
Performs well in elevated temperatures – great for engine bays, industrial equipment. |
| Classic slotted drive |
Works with any flathead screwdriver; no special bits. Preferred for vintage restoration and simple field repairs. |
❓ Frequently Asked Questions – Slotted Pan Head Screws
1. How do I measure the length of a pan head screw?
For pan head screws, length is measured from the underside of the head (the flat bearing surface) to the tip. The head itself is NOT included. So an “M4 x 10mm” screw has a 10mm long threaded shaft under the head. All our lengths follow this standard.
2. Are these screws fully threaded? What about longer lengths like 100mm?
Yes – all screws in this range (M1.6 to M10) are fully threaded from under the head to the tip, giving you maximum grip in blind holes or when using nuts.
3. Why choose slotted drive over Phillips or Torx?
Slotted drives are the original screw drive – simple, easy to clean, and work with any flathead screwdriver. They are preferred for restoration work (antique furniture, vintage electronics) where authenticity matters, and for situations where you need precise torque control without cam‑out.
4. Can I use these screws outdoors? Will they rust?
A2 stainless steel (304) is highly corrosion‑resistant and suitable for outdoor use in most environments – rain, humidity, and coastal areas. For continuous saltwater immersion, consider A4 (316) stainless, but for general outdoor furniture, marine hardware, and garden equipment, A2 is excellent and will not rust.
5. What screwdriver size do I need for slotted screws?
Choose a flathead screwdriver that matches the slot width. For M1.6–M3, use a 2–2.5mm blade; for M4–M6, a 3–4mm blade; for M8–M10, a 5–6mm blade. Using the correct size prevents slot damage.
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 (e.g., M5 nut for M5 screw). For the best corrosion match, choose stainless steel nuts.
