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The Würth #8 x 2-1/2" flat head assembly screw is built for wood joinery where the fastener needs to reach well into the second member. A Type 17 auger point, coarse thread, combo Phillips/square drive, flat head with nibs, and zinc finish come together in a screw designed for cabinetry, furniture, and general woodworking assembly.
At 2-1/2 inches, this screw is long enough to penetrate well into the receiving member after passing through the first piece. That makes it a natural fit for joining cabinet carcass sides to top and bottom panels in 3/4" sheet goods, attaching structural backing blocks, securing cabinet components to wall blocking, and similar assemblies where a shorter screw would not reach enough material to hold. It is also a common choice for face-frame attachment to the cabinet box when the combined stock calls for extra depth. The coarse thread engages softwood, plywood, MDF, and particleboard effectively at this length, making it versatile across the sheet goods and dimensional lumber typical in cabinet and casework construction.
The flat head carries small nibs on its underside that cut and collect material as the screw seats, letting the head countersink cleanly in most wood-based panels without a separate operation. In finished or visible surfaces, pre-drilling a countersink still produces the cleanest result, but in cabinet interiors and structural locations the nibs handle the work reliably. The Type 17 auger point contributes from the other end: its longitudinal flute clears wood fibers ahead of the thread, reducing the torque and splitting pressure that would otherwise build in denser stock or near edges. Together, both features help the screw drive quickly and seat completely without cracking or mushrooming the surrounding material.
The combo Phillips/square recess is designed to accept either drive type so a change in available bits does not stop the work. The square recess is designed to hold the screw on a correctly sized bit for one-handed placement, which matters during overhead or awkward cabinet installation when a free hand is useful. The zinc finish is appropriate for the dry interior environments where most cabinetry and furniture assembly takes place. This is an indoor screw; for outdoor or pressure-treated applications, choose a coating rated for those conditions.
Cabinet shops building carcasses from 3/4" plywood or MDF will find the 2-1/2" length covers the most common deep-joining situations without overdriving. Finish carpenters attaching face frames to heavier box stock and furniture builders joining thicker components will reach for this size regularly. The 1,000-count box is sized for production use, providing enough screws to keep a multi-cabinet run moving without reordering mid-project.
Yes. The combo recess accepts a standard #2 Phillips bit or a #2 square bit. Either works in the same recess, so no special tooling is required if Phillips is what you have on hand.
In most wood-based panels and softwoods, the nibs mill the countersink as the head seats, so a separate step is often unnecessary. For visible or finished surfaces where a perfectly clean entry matters, a pre-drilled countersink gives a more precise result.
Yes. Coarse thread provides better pull-out resistance than fine thread in low-density engineered panels like MDF, particleboard, and plywood. Fine thread is the right choice for hardwood face frames.
No. The zinc finish is suited for dry indoor environments. Outdoor work or pressure-treated lumber calls for a screw with a heavier corrosion-resistant coating.
The Type 17 auger point has a longitudinal flute near the tip that shaves and removes wood fibers as the screw drives. That reduces the pressure that builds up ahead of the thread, lowering the chance of splitting in denser wood and reducing the driving torque required to seat the screw fully.
When the assembly calls for a screw that gets well into the second member, the Würth #8 x 2-1/2" flat head assembly screw delivers the length, thread, point, and head geometry to do that work cleanly in cabinet and casework applications.
Sold In: 1000 Each
