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When your assembly requires a clean, flush surface — whether it's a computer chassis panel, an electronics enclosure, or a furniture joint — a protruding screw head is more than an eyesore. It can interfere with fit, block covers, and create snag points. M3 countersunk screws solve this by sitting flush with or below the surface, keeping your build clean and professional.
These Phillips countersunk flat head machine screws are precision-formed from carbon steel with an electroplated white zinc finish, providing corrosion resistance, oxidation resistance, and a clean silver-white appearance. Available in M3 thread diameter across four lengths — 5, 6, 8, and 12 mm — with pack quantities from 100 to 1000 pieces to match any project scale.
Ideal for computer chassis and side panels, hard drives, optical drives, graphics cards, electronics enclosures, electric toys, motorcycles, fishing gear, furniture assembly, and general DIY mechanical applications requiring a flush-fit M3 fastener.
| Type | Countersunk (Flat Head) Machine Screw — Phillips drive |
|---|---|
| Thread Standard | Metric (ISO) — M3 x 0.5 mm pitch (coarse) |
| Thread Diameter | M3 (3 mm) |
| Available Lengths | 5 mm · 6 mm · 8 mm · 12 mm |
| Drive Style | Phillips (cross) — #1 Phillips driver recommended |
| Head Style | Countersunk / Flat Head (90° included angle, flush-fit) |
| Material | Carbon Steel |
| Surface Treatment | Electroplated White Zinc (clear zinc) |
| System of Measurement | Metric |
| Pack Quantities | 100 · 200 · 300 · 500 · 1000 PCS |
| Typical Applications | Computer chassis, side panels, hard drives, optical drives, graphics cards, electronics enclosures, electric toys, motorcycles, fishing gear, furniture, general DIY assemblies |
These screws are made from carbon steel with an electroplated white zinc (clear zinc) finish. The white zinc plating provides corrosion resistance, oxidation resistance, and a clean silver-white appearance. The finish is environmentally compliant and lightweight.
Available lengths are 5 mm, 6 mm, 8 mm, and 12 mm, all in M3 thread diameter. Select your preferred length from the Thread Diameter x Length option above.
A countersunk or flat head screw is designed to sit flush with or below the surface of the material when fully driven. This makes it ideal for applications where a smooth, flush surface is required — such as computer chassis panels, furniture, electronics enclosures, and any assembly where a protruding head would interfere with fit or appearance.
These screws use a Phillips (cross) drive. A #1 Phillips screwdriver is typically used for M3 screws. Use the correct bit size to prevent cam-out and head damage.
Available pack sizes are 100, 200, 300, 500, and 1000 pieces. Choose the quantity that best matches your project scale — smaller packs for prototyping or repairs, larger packs for production runs or maintenance stock.
Yes. M3 countersunk screws are widely used in computer chassis, side panels, hard drives, optical drives, graphics cards, sound cards, and other PC components. The flat head design allows panels and covers to sit flush, which is critical for proper fit in most computer cases.
Standard M3 screws use a coarse thread pitch of 0.5 mm (M3 x 0.5). This is the default metric coarse pitch for M3 and is compatible with standard M3 nuts, threaded inserts, and tapped holes.
Choose a length based on the total thickness of the materials being fastened plus the depth of the threaded hole or nut. For countersunk screws, the length is typically measured from the top of the head to the tip. As a general rule, at least 1.5x the thread diameter (4.5 mm for M3) should engage the threaded hole for a secure hold.
