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The Würth #8 x 2-1/2" Flat Head Assembly Screw is a coarse-thread wood screw built for cabinet and woodworking assembly where the fastener needs to span thicker stock, pull deeper into a substrate, or bridge a joint that a shorter screw won't reach. It carries a Type 17 Auger point, underhead nibs, a flat head, and a #2 Phillips drive, and it ships 2500 to the box for production-volume work.
The 2-1/2" length sits in a range where panel-to-panel joints become structural and pull-through resistance starts to matter as much as seating quality. It is a practical choice when joining a face frame to a cabinet box and driving through a face frame member into a thicker substrate behind it, when fastening a solid-wood panel to backing material that needs more than an inch of thread engagement, or when assembling stacked-panel constructions where shallower screws simply don't reach. In cabinet shops running medium to heavy stock, this length handles the joints that shorter screws in the same family leave underserved. The coarse thread grabs quickly in softwood and plywood, and the Type 17 Auger point's extended flute keeps the screw moving cleanly through the material without a pilot hole in most wood applications.
The black finish on this screw is more functional than cosmetic in production cabinetry. In dark interiors, painted boxes, or stained hardwood cases, a bright zinc head draws the eye to the fastener. The black finish keeps the seated screw head low-profile and visually clean, which matters in visible interior panels and finished drawer boxes. The flat head with nibs handles the countersink without a separate drill step: as the head seats, the nibs mill the surrounding material and let the head drop flush. That sequence works well in hardwoods, softwoods, and plywood without leaving the rough shoulder that a plain flat head sometimes leaves in harder grain. The Type 17 Auger point extends the standard T17 geometry with a longer, more aggressive flute that evacuates chips more completely, which reduces the torque spike that causes splitting near the end of the drive cycle.
A box of 2500 is sized for shops that go through fasteners in quantity, not the occasional project. Cabinet manufacturers, casework installers, and millwork crews who run the same joint type repeatedly benefit most: the per-unit cost drops at this quantity, and a single box covers a significant run of assemblies without restocking. The #2 Phillips drive means no special bits are required, and every installer on the floor can run this screw with the driver already in hand. For shops that mix screw lengths across a build, keeping this 2-1/2" size stocked alongside shorter variants in the same Würth line keeps the fastener selection consistent across the job.
Coarse thread is well matched to solid softwood, plywood, and similar wood-based panels where the wider thread pitch locks in quickly. For dense hardwoods in thin stock, a pilot hole helps prevent splitting at the entry point.
In most softwoods and plywood, yes. The nibs mill the countersink as the head seats, leaving a flush result without a separate drill step. In very hard hardwoods, pre-countersinking gives a cleaner result and reduces the chance of surface tearout around the head.
The black finish is a good fit for dark stained, painted, or dark-finished interiors where a bright fastener head would be visible. It is not a corrosion-rated exterior coating, so this screw is for indoor woodworking and cabinetry.
The Auger variant has a longer, more aggressive flute than a standard T17. That extension clears chips more thoroughly on a longer drive, which is especially useful at 2-1/2" where the screw is traveling through more material before the head seats.
The flat head, coarse thread, and 2-1/2" length can work for attaching a face frame to a cabinet box when the combined material thickness supports that length. This is not a pocket-hole screw: it drives straight and is not designed for the angled pocket-hole geometry.
When the joint calls for a longer reach, a flush black head, and a point that drives cleanly without extra prep, this 2-1/2" Würth assembly screw is sized and finished to do the job across a full production run.
Sold In: 2500 Each
