USED M4x16 hex countersunk screw — the compact, flush-mount fastener you reach for when a clean, low-profile finish matters. This pre-owned screw is ready to handle light-to-moderate mounting needs in electronics enclosures, DIY furniture, and hobby projects where surface smoothness is key.

• Size and geometry: metric M4 thread with a 16 mm length, featuring a hex countersunk head that sits flush with the surface for a neat, snag-free look.
• Drive type: hex socket drive (Allen key compatible), designed for secure, precise tightening in tight spaces.
• Condition: used — may show prior installation marks but remains fully functional for intended mounting tasks.
• Ideal use cases: electronics enclosures, 3D printer frames, bracket assemblies, and other projects requiring a low-profile fastener that won’t protrude.
• Installation tips: pair with compatible M4 tapped holes or nuts for a reliable connection; ensure proper countersink depth for complete seating; consider a washer in cases where load distribution or surface variations are a concern.

Why this screw stands out: the countersunk head keeps hardware flush, reducing interference with cables, lids, or sliding components. The 4 mm diameter and 16 mm length strike a balance between grip and profile, making it a practical choice for precision builds where you want a tidy, professional finish without sacrificing performance. Perfect for makers, technicians, and hobbyists who value dependable hardware that fits standard M4 mounts and panels.