🔩 M3 M4 M5 Phillips Round Pan Head Machine Screws – 201 Stainless Steel (6–30mm Lengths Under Head)
You’re putting together a piece of electronic equipment, assembling furniture, or working on a DIY project – and you need reliable screws that won’t rust quickly. These M3, M4, and M5 round pan head screws are made from 201 stainless steel, offering good corrosion resistance and high strength for everyday use. The low‑profile pan head provides a wide bearing surface without countersinking, and the Phillips drive works with standard crosshead screwdrivers. Available in lengths from 6mm to 30mm (measured under the head). Fully threaded for maximum grip. Perfect for electronics enclosures, furniture assembly, machinery, and general repair.
✨ Key Features – 201 Stainless Phillips Pan Head Screws
- 🔘 Round pan head design – Low profile, wide bearing surface. No countersinking needed – sits cleanly on the material.
- 📏
Phillips drive – Standard cross recess works with common screwdrivers. Good torque transfer.
- 🛡️ 201 stainless steel (A1) – Offers good corrosion resistance, high strength, and excellent processing performance.
- 📏 Metric sizes M3, M4, M5 – Popular diameters for electronics, furniture, and light machinery.
- 📐 Lengths 6–30mm (under head) – Example: M4 x 10mm means thread diameter 4mm, length from under head to tip is 10mm. Fully threaded.
- ⚙️ Precision threads – Clean, burr‑free threads for smooth installation.
- 🔧 Widely used – Electronic equipment, furniture assembly, machinery manufacturing, and DIY projects.
📏 Specifications – M3 M4 M5 Round Pan Head Screws (201 Stainless)
| Thread Diameter (M) |
Thread Pitch (mm) |
Length Range (mm, under head) * |
Head Style |
Drive |
Material |
| 📐 Length measured from underside of head to tip. Fully threaded. Select exact size from dropdown. |
| M3 |
0.5 |
6, 8, 10, 12, 16, 20, 25, 30
(exact availability varies) |
Round pan head |
Phillips |
201 Stainless Steel (A1) |
| M4 |
0.7 |
| M5 |
0.8 |
* Lengths are typical – exact availability may vary. Please allow minor manual measurement errors.
📋 About 201 Stainless Steel (A1)
| Property |
Benefit |
| Corrosion resistance |
Good – suitable for indoor use and light outdoor exposure. Resists rust in normal conditions. |
| Strength |
High strength and good processing performance. Cost‑effective alternative to 304 stainless. |
| Magnetic |
201 stainless is generally magnetic (unlike 304). Normal for this grade. |
| Typical use |
Electronic equipment, furniture, light machinery, and general DIY where full 304 corrosion resistance isn’t required. |
❓ Frequently Asked Questions – 201 Stainless Pan Head Screws
1. How do I measure the length of a round 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 30mm?
Yes – all M3, M4, and M5 screws in this range (up to 30mm) are fully threaded from under the head to the tip, giving you maximum grip in blind holes or when using nuts.
3. How does 201 stainless steel compare to 304?
201 stainless has slightly lower nickel content and is more magnetic than 304. It offers good corrosion resistance for indoor and light outdoor use, but 304 is better for harsh or marine environments. 201 is a cost‑effective choice for general applications.
4. Can I use these screws outdoors? Will they rust?
201 stainless provides decent corrosion resistance for outdoor use in mild climates. However, for continuous exposure to saltwater, heavy rain, or high humidity, we recommend 304 or 316 stainless steel. For most indoor furniture and electronics, 201 is perfectly adequate.
5. What Phillips screwdriver size do I need for M3, M4, M5?
For M3 and M4, use a #1 Phillips. For M5, a #2 Phillips works best. Always use a driver that fits snugly to avoid cam‑out and head 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., M4 nut for M4 screw). For best results, match the nut material to the screw (steel nuts are fine).
