*USED* Cross Recessed Countersunk Head Self-Tapping Carbon Steel Screw ST3.5x9.5

Introducing a compact, reliable fastener built for confident woodwork and quick furniture repairs: the USED Cross Recessed Countersunk Head Self-Tapping Carbon Steel Screw ST3.5x9.5. This screw pairs a sharp Phillips drive with a low-profile countersunk head, letting you join materials cleanly and invisibly when the project calls for a flush finish.

Made from carbon steel for solid bite and durability, this self-tapping screw is designed to cut its own threads as you drive it in, reducing the need for heavy pre-drilling and ensuring a secure hold in soft woods and similar substrates. The ST3.5x9.5 size is compact enough for delicate assemblies yet long enough to reach solid engagement in common cabinetry, trim, and furniture components.

Key specifications

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  Size: ST3.5x9.5 (diameter ~3.5 mm, length 9.5 mm)


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  Head type: Countersunk, cross recessed (Phillips) drive


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  Material: Carbon steel


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  Drive: Phillips cross recess for reliable turning and reduced cam-out


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  Condition: Used

Ideal use cases

• Cabinetry and face-frame assemblies where you want a flush finish with no protruding screw heads


• Furniture repairs or upgrades in softwood components, trim work, and decorative panels


• DIY projects or professional shop tasks requiring quick, secure fastenings with straightforward installation

What to know before you buy

Because this is a used fastener, inspect the threads for wear or minor corrosion prior to installation. If you’re re-purposing, a quick run-through with a sharp screwdriver and a light test drive in scrap wood will confirm fit and bite. The compact 3.5 mm diameter is ideal for light to medium-duty tasks, offering dependable clamping without compromising material integrity when used as intended.

Tips for best results

• Use a pilot hole if you’re unsure about material density or to prevent splitting on delicate boards; start small and widen if needed


• Ensure the screw’s Phillips head seats cleanly to minimize cam-out—gently apply downward pressure as you turn


• Pair with compatible fasteners and pre-spaced hardware to maintain uniformity in assemblies