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The Würth #8 x 2-1/2" Flat Head Assembly Screw is a coarse-thread, zinc-plated fastener built for cabinet and furniture assembly applications where extra penetration depth is needed. It combines a Type 17 Auger point, a combo Phillips/square drive, flat head with nibs, and coarse threading in a production-ready box of 2500.
Most cabinet and furniture assembly screws max out at 1-1/4 to 2 inches, which is plenty for thin stock. When you are driving into thicker material combinations, such as a 3/4-inch panel face into a secondary structural member, or pulling a cabinet cleat through double-wall construction, you need a screw that reaches far enough to bite deeply into the receiving piece. At 2-1/2 inches, this screw delivers that extra thread engagement without requiring a pilot hole in most softwoods and engineered panels. It is also a practical choice for attaching wood components to built-up assemblies, securing ledger strips, or fastening cabinet backs into solid-wood frames where depth matters.
The combo drive recess accepts both a #2 Phillips and a #2 square bit. The square recess is designed to hold the screw on a correctly sized bit for one-handed placement, which helps when reaching into a cabinet box or aligning parts before driving. The flat head's underside nibs cut into the wood surface as the screw seats, so the head sits flush without a pre-drilled countersink in most wood-based materials. The Type 17 Auger point takes care of chip removal at the tip, keeping driving torque manageable through the full 2-1/2 inch length, even in denser softwoods. Each of these design elements solves a real production problem: drive slip, proud heads, and splitting near the point.
This screw is sized and finished for interior woodworking production. Cabinet shops building face-frame boxes, millwork teams assembling case components, and furniture manufacturers fastening thick structural elements will find the 2-1/2 inch length handles the jobs where standard shorter screws cannot reach. The zinc finish holds up in dry, climate-controlled shop and residential environments. This is not an exterior or pressure-treated lumber screw; for those applications, a coated or hot-dip galvanized fastener is the right call. The 2500-piece box is sized for shops that run this length in volume and want consistent supply on hand without constant reordering.
The extra half inch puts more thread into the receiving material, which matters when you are driving through a thicker face piece or into a built-up panel assembly. For standard 3/4-inch stock joined face to face, 2 inches is usually enough. When one or both pieces are thicker, or when you need deeper bite into a solid-wood structural member, 2-1/2 inches gives you that added holding depth.
No. The recess accepts either a standard #2 Phillips bit or a #2 square (Robertson) bit. Both are common in most shops. The square recess is designed to hold the screw on a correctly sized bit for one-handed placement, but that fit depends on using a properly sized bit.
In most wood and wood-based panel materials, the nibs on the underside of the head mill their own countersink as the screw seats. You typically will not need a separate countersink step. In very hard materials or laminates, testing a fastener before running production is always a reasonable habit.
This is an indoor screw. The zinc plating provides adequate protection in dry, interior environments, but it is not rated for ACQ pressure-treated lumber or prolonged outdoor exposure. For exterior or treated-lumber applications, choose a screw with a corrosion-resistant coating designed for that environment.
The Type 17 Auger point has an extended flute near the tip that cuts and clears wood fibers as the screw advances. On a 2-1/2 inch screw driving through thick material, that chip-clearing action helps maintain consistent torque through the full depth of the drive rather than building up resistance near the end.
When the joint calls for more depth than a standard assembly screw can deliver, the Würth #8 x 2-1/2" Flat Head Assembly Screw gives you the length, the drive flexibility, and the production quantity to keep cabinet and furniture work moving.
Sold In: 2500 Each
