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This Würth #8 x 2-1/4 inch flat head assembly screw is built for wood joints where the fastener needs to reach through thicker stock or laminated material and still pull tight. It combines a combo Phillips and square drive, a Type 17 Auger point, coarse thread, flat head with nibs, and a Black finish in a single screw designed for cabinet assembly, casework, and general woodworking production.
At 2-1/4 inches, this screw bridges the gap between a standard 2-inch cabinet screw and the longer 2-1/2-inch length used in heavier structural work. It is long enough to anchor through a 3/4-inch panel and reach deep into a second member — useful for attaching cabinet backs into thicker material, securing face frames to box sides in stacked-panel construction, or through-fastening built-up casework components. The extra length also provides more thread engagement in solid hardwood joints where a shorter screw might not get enough bite.
Pair this length with the Type 17 Auger point and the coarse thread, and you get a screw that drives with consistent resistance rather than stalling partway through thick stock. The combo drive means the same screw runs on a Phillips bit during volume driving and swaps to square when torque needs to stay controlled in tighter spots.
The flat head with nibs is designed for flush installation in wood and wood-based materials. As the screw is driven home, the nibs under the head mill the surrounding material to create a clean countersink seat. This matters in production work where stopping to countersink separately adds time and handling steps. The Black finish blends with dark cabinet interiors, black melamine, and finished panel goods where a zinc or silver screw head would stand out against the substrate.
Cabinet shops running high daily screw counts benefit most from this combination. The combo drive recess keeps assembly lines moving when drivers and bits vary across workstations. The 1,000-piece box reduces how often a bin needs to be refilled during a production run, and the consistent Type 17 Auger point start means fewer screws lost to walking or misalignment on dense material. This screw also suits millwork teams and commercial casework installers who work with a mix of solid wood and panel goods on the same job and need one reliable screw size across both.
Yes. The combo recess accepts a #2 Phillips or a #2 square bit, so either works in the same head without a different screw.
The extended auger flute clears wood chips as the screw advances, reducing the resistance and splitting risk that a plain sharp point can create in dense or thick lumber.
No. The nibs under the flat head mill the countersink as the screw seats, so the head ends up flush without a separate countersink operation in most wood and panel materials.
The Black finish is a good match for dark panel goods, black melamine, and cabinet interiors where a neutral or dark head is preferred over a bright zinc head.
This screw is intended for interior woodworking and cabinet assembly. For outdoor or treated-lumber applications, choose a screw with a corrosion-rated coating.
When the joint calls for a screw long enough to anchor through combined panel thickness and the job demands a driver-friendly combo recess, this Würth #8 x 2-1/4 inch assembly screw covers both without compromise.
