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This Würth #8 x 2-1/2 inch flat head assembly screw is sized for woodworking joints where more thread engagement is needed: thicker panels, built-up sections, and assemblies where a shorter screw simply does not reach. A turbo thread, sharp point, lubricated finish, milling nibs under the head, and a combination Phillips/square drive make it a practical production screw for cabinet shops and installers working through denser or multi-layer material.
At 2-1/2 inches, this screw reaches into assemblies that outrun shorter fasteners. Joining a face frame to a cabinet box through two layers of 3/4-inch material, fastening a cleat or ledger to a carcass side, running screws through a plywood drawer box wall into a solid back, or building up a thicker substrate from laminated sheet goods — these are the situations where 2-1/2 inches earns its place. The turbo thread grabs quickly in both solid wood and engineered panels, so the extra length does not translate into extra driving effort. The sharp point self-starts without pre-drilling in most wood-based materials, which keeps pace on a production floor.
The flat head seats flush because the milling nibs underneath cut their own countersink recess as the screw is driven. That eliminates the countersink step on most materials, which matters when you are running through hundreds of joints in a shift. The lubricated finish keeps friction low through the full driving depth, protecting the drive recess from cam-out at the moment the head seats. The combination recess accepts both a #2 Phillips and a #2 square bit, so the screw runs on whichever driver is in hand without switching bits. The square side of the recess is designed to hold the screw on a correctly sized bit for one-handed placement.
A box of 2,500 screws suits a shop running cabinet cases, drawer boxes, and built-ins at volume. The lubricated finish and turbo thread reduce the torque demand on drivers, which extends bit life and lowers the chance of head damage when a screw is driven at an angle or into a denser section. Cabinet installers stacking cabinets, fastening scribes, or securing structural cleats to finished carcasses get the same benefit: a screw that drives cleanly through thicker material without bogging down. For interior woodworking applications, this screw handles hardwood and softwood carcasses as well as MDF and particleboard-based panels.
Use the 2-1/2 inch length when fastening through two layers of 3/4-inch material, securing a thick cleat or ledger to a panel, or building up a substrate from laminated sheet goods where a 1-1/2 or 2 inch screw would not reach the full depth of the joint.
Yes. The wider-pitch turbo thread reduces driving torque and penetrates quickly in solid wood and in engineered panels such as MDF, particleboard, and plywood.
The lubricated finish lowers driving friction, which protects the drive recess from cam-out and reduces the torque demand on the driver. That matters most during long production runs where driver fatigue and bit wear accumulate.
In most wood-based materials, yes. The milling nibs under the flat head cut their own countersink as the screw seats, so the head sits flush without a pre-drilled countersink in typical cabinet and woodworking applications.
The sharp point self-starts in most wood and panel materials without a pilot hole. In very dense hardwood or when driving close to an edge, a pilot hole reduces splitting risk.
When the assembly calls for more reach, this 2-1/2 inch Würth flat head screw delivers the thread engagement, drive flexibility, and friction-reducing finish to keep production moving cleanly through thicker stock.
Sold In: 2500 Each
