The Würth #8 x 3" flat head assembly screw is built for wood-to-wood fastening where extra length is needed to pull joints tight and stay locked in position. The 3-inch shank reaches through thicker composite panels, solid lumber, or stacked substrates that shorter screws cannot bridge, making this a go-to for cabinet builders, millwork shops, and finish carpenters working with dimensional material.
Most cabinet assembly screws top out at 2 or 2-1/2 inches, which is sufficient for 3/4-inch panel-to-panel joints. But production work regularly turns up situations where a longer fastener earns its place: attaching a cabinet box through a full-depth nailer and into wall framing, running screws through doubled-up plywood gussets, fastening hardwood components where maximum thread engagement matters, or securing cabinet cases to a substrate through an intermediate layer. At 3 inches, this screw threads deep enough to anchor through those stacked sections without changing to a different fastener mid-job. The coarse thread pattern pulls material together along the full engaged length, and the partial shank geometry lets the head draw the joint closed rather than binding in the near panel.
The Type 17 Auger Point carries a longer, more aggressive chip-clearing flute than a standard Type 17, which reduces the torque needed to start the screw in dense or thick lumber and lowers the risk of splitting near the end grain. The flat head's underhead nibs do double duty: they mill the wood fibers as the head seats and resist backout by adding rotational friction once the screw is driven home. The zinc finish provides corrosion protection suitable for indoor cabinet and millwork environments. This screw is for dry, interior applications.
A box of 1000 suits cabinet shops running volume production, millwork teams fastening dimensional components on large runs, and contractors assembling built-ins or site-built cabinetry where the job calls for a longer screw across several assemblies. The #2 square drive recess is designed to hold the screw on a correctly sized bit for controlled one-handed placement, which reduces fumbling during repetitive driving in tight cabinet interiors. Pair this screw with a square bit matched to the recess size to get the full benefit of the drive geometry.
When the joint involves stacked material, a nailer block, or dimensional lumber deeper than standard 3/4-inch panels, a 3-inch screw provides the thread engagement needed to pull the joint tight and hold. Shorter screws may not reach the second substrate or may leave too little thread engaged for a reliable hold.
The Type 17 Auger Point has a fluted tip that cuts and ejects wood fibers as the screw enters the material. In thick or dense stock, that chip-clearing action reduces driving torque and lowers the chance of the screw splitting the wood near the tip.
In most softwoods, plywood, and composite panels, yes. The nibs mill the recess as the screw seats, pulling the head flush without a separate countersink operation. In very hard or dense hardwoods, a light pilot countersink may still improve the result.
No. The zinc finish on this screw is rated for dry indoor use. For exterior work or pressure-treated lumber, a screw with a corrosion-resistant coating rated for ACQ compatibility is the right choice.
This screw uses a #2 square drive bit. Using a correctly sized bit gives the drive recess the grip it is designed for and reduces wear on both the bit and the recess during repetitive driving.
When the joint is thicker than a standard panel and a shorter screw is not enough, this Würth #8 x 3" flat head assembly screw covers the gap with a Type 17 Auger Point, nibs that countersink on the fly, and a #2 square drive that holds steady through a full box of production fastening.
Sold In: 1000 Each
