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This Würth #8 x 1-3/4-inch flat head assembly screw is built for wood-to-wood fastening in cabinet carcasses, furniture frames, and interior millwork where a clean, flush finish and reliable holding power matter. The black finish blends into dark cabinet interiors so fastener heads stay inconspicuous after installation.
At 1-3/4 inches, this screw has enough shank length to penetrate through one layer of 3/4-inch stock and bite firmly into a second member behind it, making it a natural fit for cabinet box assembly, back panel attachment, and similar carcass-building tasks. It also works well for attaching drawer box sides, securing interior partitions, and fastening wood components where a shorter screw would under-penetrate and a longer one would break through. The flat head seats flush in pre-drilled or nib-milled countersinks, so the interior surface stays clean and flat for drawer slides, shelves, and other hardware that needs a smooth reference face.
The flat head carries a ring of underhead nibs that engage the wood surface as the screw is driven, reaming a clean countersink on the way down. This removes the need to countersink separately in most wood substrates, which speeds up repetitive assembly work. The Type 17 Auger point adds a longitudinal flute near the tip that clears wood chips and lowers the torque needed to start the screw, reducing the risk of splitting in denser wood species and at tighter edge distances. Coarse threads run up most of the shank for maximum engagement in wood and wood-based panel products. The black finish is an indoor coating suited to dry cabinet environments; this screw is for interior applications only.
Cabinet shops building boxes in volume benefit from a screw that starts fast, seats flush without extra prep, and arrives in quantities that keep the bin full through a production run. The 4,800-piece box supports that kind of throughput. The #2 Phillips drive means any standard driver already on the tool belt or in the CNC pocket is ready to go without a bit change. For designers specifying hardware packages and contractors assembling pre-built cabinetry on site, the black finish provides a cleaner result inside dark-interior boxes than a zinc or silver-headed fastener would. Homeowners tackling a cabinet build or furniture project will find the screw straightforward to use with a standard drill-driver.
The nibs on the underside of the flat head act as small cutting ridges that mill the wood surface as the screw is driven down. In most wood and plywood substrates, the head seats flush without a pre-drilled countersink, which removes a step from the assembly process and keeps the interior surface clean.
For a face-to-face or edge joint between two 3/4-inch members, a 1-3/4-inch screw passes through the first piece and drives into the second for a reasonable depth of engagement. For joints where the screw enters at an angle, or where one member is thinner, confirm that the penetration depth into the receiving piece is appropriate for the load.
The Type 17 Auger point has a flute cut into the tip that removes wood fiber as the screw enters. This reduces the torque required at startup and lowers the pressure that causes splitting, particularly when driving near an edge or into a harder wood species. A plain sharp point pushes material aside rather than clearing it.
Coarse-thread flat head screws can be used in MDF and particleboard, though holding power in engineered panels is generally lower than in solid wood or plywood. For edge joints in particleboard, a confirmat-style fastener is usually a better choice. In face or panel fields, this screw seats well and the nibs help it countersink cleanly.
No. The black finish on this screw is for dry indoor environments. It is not rated for exterior use, wet areas, or contact with pressure-treated lumber. For outdoor or high-moisture applications, choose a screw with a corrosion-resistant coating rated for that exposure.
When the job calls for a flush-seated, black-finished assembly screw that starts clean and holds firm in 3/4-inch cabinet stock, this Würth #8 x 1-3/4-inch flat head screw delivers that result at production scale.
Sold In: 4800 Each
