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When a flush finish matters and corrosion resistance is non-negotiable, solid brass countersunk machine screws deliver both. Unlike plated steel fasteners, where the protective layer can chip or wear away, these screws are machined from solid brass — providing inherent corrosion resistance, a non-magnetic construction, and a warm gold-tone appearance that suits both functional and decorative applications.
The countersunk (flat) head profile is designed to sit flush with or below the surface of the workpiece when driven into a properly prepared countersunk hole, making these screws ideal for furniture, cabinetry, electronics enclosures, musical instruments, marine hardware, and anywhere a clean, flush finish is required.
Available in M2, M2.5, M3, M4, M5, and M6 thread diameters with lengths from 4mm to 40mm, and in packs of 10, 20, 50, or 100 pieces to suit both single projects and workshop stock requirements.
| Material | Solid Brass |
|---|---|
| Thread Standard | ISO Metric |
| Drive Type | Phillips (PH / Cross Head) |
| Head Style | Countersunk (Flat Head, 90°) |
| Thread Diameters | M2, M2.5, M3, M4, M5, M6 |
| Lengths Available | 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 30mm, 35mm, 40mm (varies by diameter) |
| Pack Sizes | 10 Pcs, 20 Pcs, 50 Pcs, 100 Pcs |
| Recommended Driver | PH0 (M2–M2.5) / PH1 (M3–M4) / PH2 (M5–M6) |
| Head Angle | 90° Countersunk |
| Finish | Natural Brass |
| Country of Origin | Contact us to confirm |
A countersunk (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 protruding head would be unacceptable — such as furniture assembly, cabinetry, electronics enclosures, and decorative hardware. The conical underside of the head seats into a matching countersunk hole in the workpiece.
Solid brass offers natural corrosion resistance without relying on a plating layer that can chip or wear away. Brass is also non-magnetic, non-sparking, and has an attractive gold-tone appearance that suits decorative applications. It is commonly used in marine environments, electrical assemblies, musical instruments, furniture, and anywhere a premium finish is required. Brass is softer than steel, so it is best suited for light-to-medium duty applications.
Phillips head screws require a Phillips (PH) screwdriver. For M2–M2.5 screws, a PH0 driver is typically used. For M3–M4, a PH1 driver is standard. For M5–M6, a PH2 driver is appropriate. Using the correct size driver reduces the risk of cam-out and head damage.
Yes. For the screw head to sit flush, you need to drill a clearance hole for the shank and then countersink the top of the hole to match the angle of the screw head (typically 90°). The countersink diameter should match the head diameter of the screw. Driving a countersunk screw into an unprepared hole will leave the head proud of the surface.
These screws follow the ISO metric thread standard, compatible with standard metric nuts, threaded inserts, and tapped holes in the corresponding size (M2, M2.5, M3, M4, M5, or M6).
Solid brass has good natural corrosion resistance and performs well in mildly humid or marine environments. However, brass can tarnish over time when exposed to the elements. For harsh outdoor or fully submerged applications, stainless steel or marine-grade fasteners may be more appropriate. For indoor, decorative, or lightly exposed outdoor use, brass is an excellent choice.
For machine screws used with a nut, the screw should extend at least 1–2 thread pitches beyond the nut when fully tightened. For screws threading into a tapped hole, aim for at least 1.5× the thread diameter of engagement. For countersunk applications, account for the depth of the countersink when selecting length.
