🔩 M3 Phillips Small Round Head Machine Screws – Carbon Steel Nickel Plated, Lengths 5mm to 30mm
You need a reliable little screw for a small repair – maybe a laptop hinge, a model project, a piece of furniture, or a delicate woodworking join. These M3 round head screws are exactly that: small, strong, and ready to work. The Phillips drive gives you good control, and the nickel‑plated carbon steel resists rust in normal indoor conditions. Choose from lengths 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, or 30mm. The round head sits neatly on the surface – no countersinking needed. Keep a few sizes in your shop for all those times you need a tiny bolt that just works.
✨ Key Features – M3 Round Head Phillips Machine Screws (Small Bolts)
- 🔘 Round head design – Low profile with a smooth dome. Sits above the surface cleanly, no countersinking required. Great for wood, plastic, and thin metal.
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📏 Phillips cross drive – Standard recess that fits most screwdrivers and bits. Even torque distribution reduces cam‑out and slipping.
- 🧪 Nickel‑plated carbon steel – Provides a protective layer against moisture and light corrosion. Better than plain steel, ideal for indoor use and semi‑humid environments (kitchens, basements).
- 📏 Multiple lengths available – From 5mm up to 30mm (in 5, 6, 8, 10, 12, 16, 20, 25, 30). Pick exactly what your project needs.
- ✨ Clean, burr‑free threads – Advanced production ensures smooth thread flanks, no sharp burrs, and consistent pitch. Fastens smoothly without binding.
- 🛠️ Widely used in machinery & wood products – Simple, low‑cost fastener for general equipment, electronic enclosures, furniture assembly, and hobby projects.
📏 Technical Specifications – M3 Small Round Head Screws
| Parameter |
Details |
| Product name |
Small Round Head Screws – M3 Phillips Machine Screws |
| Thread diameter |
M3 (3mm metric thread) |
| Available lengths (mm) |
5, 6, 8, 10, 12, 16, 20, 25, 30 |
| Head shape |
Round (dome top) |
| Drive type |
Phillips cross recess |
| Material |
Carbon steel, nickel plated |
| Corrosion resistance |
Good for indoor & light humidity (nickel coating) |
❓ Frequently Asked Questions – M3 Round Head Screws
1. Are these screws self‑tapping? Can I drive them directly into wood or plastic?
No – these are machine screws, not self‑tapping screws. They are designed to go into a pre‑threaded hole (metal nut, threaded insert, or tapped plastic/metal). For wood or soft plastic without threads, drill a pilot hole slightly smaller than 3mm and the screw will cut its own threads, but it’s not optimized for that. For direct wood fastening, we recommend actual wood screws.
2. Will the nickel plating rust if I use these outdoors?
Nickel plating offers good protection against indoor humidity and occasional moisture, but it is not fully waterproof. For outdoor use or constant contact with water, choose stainless steel screws. These are best for indoor furniture, electronics, and workshop jigs.
3. What’s the difference between a round head and a pan head screw?
A round head has a taller, more domed profile than a pan head, which is flatter and wider. Round heads give a classic “button” look and are often used in older machinery or decorative applications. Both sit above the surface and don’t require countersinking.
4. Do I need a special nut for these M3 screws?
Standard M3 metric nuts (0.5mm pitch) will fit perfectly. You can also use them in pre‑tapped holes that are threaded for M3. We sell nuts separately – check our store for matching M3 hex nuts or nylon lock nuts.
5. Can I cut these screws to a shorter length?
Yes – carbon steel screws can be cut with a hacksaw or rotary tool. After cutting, file the tip smooth and clean the threads with a nut to remove burrs. However, it’s easier to just order the correct length from our list.
6. Are these screws strong enough for load‑bearing furniture?
For light to medium loads (e.g., attaching hinges, drawer slides, or small brackets), yes. For heavy loads (bed frames, shelving with hundreds of pounds), we recommend larger diameters (M4, M5, M6) or steel wood screws. M3 is a small fastener – great for delicate assemblies.
