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The Würth #8 x 2-1/2" Flat Head Assembly Screw is a coarse-thread, sharp-point wood screw built for cabinet and woodworking assembly where the extra length reaches through stacked material or thicker panels. The combination Phillips/square drive accepts either a #2 Phillips or a #2 square bit in the same recess, and a lubricated finish keeps driving friction low across a full box of production work.
A 2-1/2" screw covers ground that shorter assembly screws cannot. In cabinet box construction, this length passes cleanly through a 3/4" panel and drives deep into a second member, pulling the joint tight without bottoming out. It works well attaching cabinet backs to thicker stiles or rails, securing nailers and blocking inside carcasses, and fastening solid-wood components where full thread engagement in the receiving piece determines holding power. The coarse thread grips softwood, pine, plywood, and furniture-grade sheet goods efficiently, and the flat head countersinks flush when a pilot and countersink are run first.
The combination recess accepts a #2 Phillips or a #2 square bit, which matters in a busy shop where different drivers end up at different stations. The square recess is designed to hold the screw on a correctly sized bit for steadier one-handed placement in tight cabinet interiors. The Phillips option keeps the screw compatible with the widest range of available bits on any crew. The lubricated finish does real work across a large box run: lower driving torque means less fatigue on the tool motor, less cam-out risk, and more consistent seating depth from the first screw to the last. For indoor cabinet and woodworking assembly, this finish is appropriate for dry applications.
Cabinet shops running box assembly in volume are the primary fit. A 2,500-piece box at this length covers a significant stretch of production without a restocking pause, which keeps the line moving. The length also suits finish carpenters and millwork installers who encounter thicker stock during site installation, where a 2" screw would fall short of full engagement. The combination drive adds flexibility for small crews where not every operator runs the same bit, and the sharp point handles the softwood and plywood substrates that dominate residential cabinet work without requiring a separate pilot step in most cases.
Yes. At 2-1/2", this screw passes through a 3/4" panel and drives approximately 1-3/4" into the receiving member, giving coarse-thread engagement well beyond the minimum needed for a solid joint in plywood or softwood.
The sharp point self-starts in softwood and most engineered panels, but the flat head requires a countersink to seat flush. Running a combination pilot-and-countersink bit before driving gives you a clean, flush result in hardwood or any painted or finished surface where a proud head is not acceptable.
Yes. The combination recess accepts a #2 Phillips driver. For better torque transfer and reduced cam-out, a #2 square bit is the preferred choice, but Phillips works when that is what is available.
The lubricated finish is a dry-to-the-touch coating intended to reduce driving friction. It does not leave a wet residue that would interfere with paint or finish adhesion in typical cabinet interiors.
No. This screw carries a lubricated finish suited for dry indoor work. Outdoor or pressure-treated lumber applications need a corrosion-rated coating such as hot-dip galvanized or a finish rated for ACQ compatibility.
When the job calls for more reach than a standard 2" screw provides, the #8 x 2-1/2" gives you the thread engagement depth to pull thicker stock together cleanly, with a drive that adapts to whatever bit is in the gun.
Sold In: 2500 Each
