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The Würth #8 x 2-1/4" flat head assembly screw is a production-oriented fastener built for cabinet boxes, casework panels, and interior woodworking assemblies where a flush-seated head, reliable thread bite, and clean countersinking matter. The 2-1/4" length suits through-panel connections in 3/4-inch stock with solid embedment into a second member, making it a practical choice for box construction, shelving carcasses, and furniture panel joinery.
At 2-1/4", this screw passes through a 3/4-inch panel and reaches 1-1/2" into a second member — enough embedment depth for solid holding power in shelf-side-to-bottom joints, cabinet back attachment into solid sides, and panel butt joints in frameless box construction. It also works for attaching nailers and stretchers inside cabinet carcasses where a shorter screw would underperform in withdrawal. Shop crews building production runs of base or wall cabinets will find this length handles the most common through-panel fastening situations without requiring a length change for each joint type.
The combo drive recess accepts both a #2 Phillips and a #2 square bit in the same head, which keeps installation moving when bit styles vary across a crew or when a square bit is not immediately at hand. The Type 17 Auger Point uses a longer, more aggressive flute than a standard Type 17, clearing chips efficiently and reducing the torque spike that causes splits near edges or in thinner panels. As the flat head approaches the surface, the underhead nibs begin milling material, so the head finishes flush without pulling fibers up around the countersink. The result is a clean, seated head that sits tight to the panel face in hardwood, softwood, MDF, particleboard, and melamine-faced sheet goods.
The black finish on this screw is a functional choice for cabinet interiors, painted carcasses, and dark-laminate casework where a standard zinc or silver head would draw the eye to every fastener location. Cabinet shops finishing interiors in black melamine or dark-painted plywood often spec a black-finished screw specifically to keep the inside of the box looking clean after assembly. This screw is designed for dry indoor work — it is not rated for exterior or high-humidity environments, and the black finish is not a corrosion-protection coating in the way a galvanized or ACQ-rated coating would be.
A 3,500-piece box is sized for shops that run consistent production volume rather than occasional one-off builds. Cabinet manufacturers, millwork facilities, and larger custom shops building multiple kitchens or commercial casework projects at a time will cycle through this quantity without the box sitting on a shelf for months. The combo drive keeps the screw compatible across mixed-tool environments where not every installer runs the same bit, and the Type 17 Auger Point reduces the likelihood of splitting or stalling in the dense engineered panels common in production cabinetry.
The 2-1/4" length passes through a 3/4-inch panel and provides about 1-1/2" of embedment in the receiving member — more than a 2" screw offers and easier to control than a 2-1/2" in thinner stock. It is a practical middle length for standard 3/4-inch panel joinery.
Yes. The combo drive recess accepts either a #2 Phillips or a #2 square bit, so either works for installation.
The Type 17 Auger Point has an extended fluted tip that removes wood fibers and chips as the screw enters the material. This reduces the torque needed to drive the screw and lowers the risk of splitting near edges, which a standard sharp point does not provide.
Yes. The coarse thread and Type 17 Auger Point are suited to MDF, particleboard, and melamine-faced sheet goods, which are common in production cabinet construction.
No. This screw has a black interior finish and is intended for dry indoor cabinet and casework assembly. For exterior or pressure-treated lumber applications, a corrosion-rated coating is required.
The nibs mill a clean countersink in the panel surface as the head seats, allowing the flat head to sit flush without a separate countersink drill step in most wood-based panel materials.
When the joint is a 3/4-inch panel running into a second member and the build is production cabinet or casework work, the Würth #8 x 2-1/4" flat head assembly screw has the length, thread, point, and head geometry to get each fastener seated cleanly and keep the line moving.
Sold In: 3500 Each
