The Würth #8 x 1-5/8" assembly screw is a flat head, coarse thread fastener built for wood assembly work where 3/4-inch material is the standard. With a Type 17 Auger point, underhead nibs, and a #2 square drive, it drives cleanly through cabinet panels, furniture components, and millwork parts without requiring a separate countersink operation.
At 1-5/8 inches, this screw is a natural fit for cabinet box assembly, face-frame attachment to cabinet boxes, drawer box construction, and furniture panel joinery. The length leaves enough thread embedded in the receiving member to hold without bottoming out or breaking through standard 3/4-inch sheet goods. Cabinet shops running carcass assembly on melamine or plywood consistently reach for this length when fastening panels edge-on, attaching nailers, or securing backs to cabinet sides. It also serves finish carpenters and millwork installers who need a reliable coarse-thread fastener for softwood or sheet-goods work on the job site.
The Type 17 Auger point carries a longitudinal flute that evacuates wood chips as the screw enters, which lowers the torque needed and reduces the risk of splitting when driving near edges or into denser sheet goods like MDF. Once the screw nears depth, the nibs on the underside of the flat head mill their own countersink seat, so the head finishes flush without a pre-drilled countersink. The #2 square drive completes the package: its tapered recess is designed to hold the screw on a correctly sized bit, which matters most when you are reaching into a cabinet box or working overhead and cannot easily use a second hand to hold the fastener in place.
The screw is steel with a zinc finish. Zinc provides standard galvanic protection that handles the dry, climate-controlled conditions of a cabinet shop or finished interior space. This is an indoor fastener, well suited to kitchen cabinets, bath vanities, closet systems, furniture cases, and interior millwork. Keep it inside and away from prolonged moisture exposure.
Cabinet manufacturers running production lines value the 1,000-piece box for keeping assembly stations stocked without frequent resupply. Custom cabinet shops building in hardwood plywood or melamine particleboard use it as a workhorse carcass fastener. Finish carpenters and installers on site reach for it when assembling prefabricated cabinet components or securing millwork in dry interior spaces. The square drive and self-countersinking head reduce tool changes and extra steps, which adds up across a full kitchen or commercial casework project.
At 1-5/8 inches, the screw passes through a 3/4-inch panel and embeds roughly 7/8 inch into the receiving member. That gives the coarse thread enough engagement depth to hold securely without punching through the far face of standard sheet goods.
No. The nibs on the underside of the flat head are designed to mill their own countersink as the screw seats. In most softwoods, plywood, MDF, and particleboard, the head will finish flush without a separate boring step.
The Type 17 Auger point has a longitudinal flute cut into the tip. That flute removes wood fibers as the screw enters instead of pushing them aside, which lowers driving torque and reduces splitting, especially near panel edges and in denser materials like MDF.
Yes, a #2 square drive bit fits this screw. The tapered recess is designed to retain the screw on a correctly sized bit for placement. Bit retention works best with a properly sized, unworn bit.
This screw carries a standard zinc finish, which is rated for dry indoor environments. It is not intended for exterior exposure, pressure-treated lumber, or high-humidity applications.
Coarse thread provides strong pull-out resistance in low-density engineered panels like MDF and particleboard by engaging more material volume per thread. It is the right choice for these substrates, though driving near the edge of particleboard still benefits from the splitting resistance the Type 17 Auger point provides.
The Würth #8 x 1-5/8" flat head assembly screw delivers the length, point, head geometry, and drive combination that cabinet assembly demands: flush seating without pre-countersinking, reduced splitting, and a square drive that stays on the bit when both hands are busy holding the panel.
Sold In: 1000 Each
