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The Würth #8 x 1" flat head assembly screw is a short-body fastener built for cabinet boxes, drawer bottoms, panel backs, and any joint where a longer screw would over-penetrate or break through the back face. A combo drive recess, coarse thread, Type 17 Auger point, and milling nibs under the flat head make it a capable everyday screw for production shops and finish installers working with 3/4-inch and thinner stock.
A 1" screw is sized for joints where the combined panel thickness is 3/4 inch or less, or where a longer screw would punch through the opposite face. Cabinet back panels pinned to a 1/2-inch rabbet, shelf pin reinforcement strips, and drawer-bottom-to-side connections are the natural homes for this length. It also works well for attaching thin hardware backing blocks and securing decorative panels to cabinet interiors, where the goal is a clean, flush head and no blowout on the back face. Shops assembling melamine or PVC-faced particleboard find the short length especially useful: the nibs seat the head cleanly in the laminate surface without the countersink wandering or chipping the face.
The combo recess is the same physical cavity that a #2 Phillips bit drops into or a #2 square bit locks into, so there is no need to segregate screws by driver type on a busy assembly bench. Square bits hold the screw on a correctly sized bit for placement into tight corners; Phillips bits are the fallback when a square bit is not at hand. Either way, the screw drives without switching fasteners. The flat head carries small milling nibs on its underside that scour a clean countersink as the head descends. In plywood, MDF, and melamine-faced particleboard, this eliminates the separate countersink drill pass that bare flat-head screws require and reduces the chance of laminate chipout around the head.
Cabinet shops running production lines benefit most from the 11,000-piece box: the supply is there to load a bin and work without interruption. The black finish is a practical choice in shops building dark interiors or installing hardware backing in visible areas where a silver screw head would stand out. Finish installers attaching panel backs in the field appreciate the short length because it removes the mental check of whether the screw will punch through a finished face. The Type 17 Auger point starts reliably in particleboard and plywood without spinning out, keeping drive cycles consistent across a long assembly run.
Yes. The combo recess accepts a standard #2 Phillips bit. A #2 square bit also fits the same recess and provides better bit retention for one-handed placement when using a correctly sized bit.
The nibs on the underside of the flat head mill a countersink as the screw seats, so a separate countersink step is not required in most wood-composite panel materials. Drive speed and panel density can affect how cleanly the head seats, so a test drive on scrap is a good check before running a full production batch.
For a face-to-edge joint through a 1/2-inch panel and into a 3/4-inch edge, 1 inch gives about 1/2 inch of thread engagement in the second panel. That is on the shorter end for a loaded shelf joint but adequate for cabinet back attachment and panel-to-panel connections that are not carrying a direct shelf load. For heavier joints, a longer length in this same family provides more embedment depth.
The Type 17 Auger point has a fluted recess near the tip that captures and removes wood fibers as the screw enters. This lowers the torque needed to start and drive the screw compared to a standard sharp point, which is useful in dense or abrasive panel materials like particleboard and MDF where a plain sharp tip can spin before catching.
This screw carries a black finish intended for dry interior applications. It is not rated for exterior exposure or high-humidity environments. For outdoor or wet-area work, choose a screw with a corrosion-rated coating.
When the joint calls for a 1-inch screw, this Würth assembly screw has the drive versatility, the point geometry, and the head design to get through a production day cleanly, without pre-countersinking, without swapping bits, and without the back-face blowout that a longer screw would risk.
Sold In: 11000 Each
