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This Würth #8 x 3" flat head assembly screw is built for wood joints where the extra length does the work: thick panels, stacked members, and cabinet box assemblies where a shorter screw would not reach the second workpiece with enough thread engagement. A Type 17 Auger point, coarse thread, Phillips drive, and milling nibs make it a production-ready fastener for interior woodworking applications.
A 3-inch screw is the right choice when the joint demands more than thread engagement in a single panel. Fastening a cabinet back through a side panel and into a nailer, joining two layers of sheet goods, pinning a thick face frame to a deep box, or running screws through a 1-1/2-inch rail into backing that sits behind it — these are the assemblies where shorter screws come up short. The extra length also gives the coarse thread more surface contact in the second member, which translates directly to pull-out resistance in softwood and engineered panels.
The Type 17 Auger point carries a milled flute that ejects wood fiber ahead of the thread, reducing the resistance that builds up on longer screws driven into dense or thick stock. That matters at 3 inches because driving torque accumulates across the full shank length before the head seats. The flat head with underside nibs handles the countersinking step: as the head approaches the surface, the nibs mill the entry so the head finishes flush without tearing or raising the surrounding material. Coarse threads are the right profile for solid wood and sheet goods — the wider pitch locks into fibrous and composite substrates more effectively than a fine thread would in those materials.
Cabinet shops running production box assembly, millwork teams building panels with backing, and installers working with built-up lumber will find this screw fits naturally into the rotation. The #2 Phillips drive means no bit changeover from the rest of the shop's screw inventory. Packed 1000 to the box, the quantity supports high-volume runs without constant restocking. This is an interior fastener — the zinc coating is appropriate for dry, climate-controlled environments and is not intended for exterior or high-moisture applications.
When the joint passes through more than one layer — a panel into a nailer, a rail into a deep box side, or stacked sheet goods — the 3-inch length keeps enough thread in the second member to resist pull-out. Shorter screws may not reach the second workpiece with meaningful thread engagement in those situations.
The Type 17 Auger point has a longitudinal flute that clears wood fibers as the screw advances. On a 3-inch screw, that chip-clearing action reduces the torque build-up that can stall a driver or strip the head before the screw is fully seated.
No. The nibs mill the countersink as the screw drives home, so the head seats flush in softwood, plywood, and most engineered panel substrates without a separate countersink operation.
No. The zinc finish is rated for dry indoor use. For exterior work or pressure-treated lumber, a coating rated for ACQ compatibility is required.
It accepts a #2 Phillips bit, the standard size for #8 screws and the most common bit in cabinet and woodworking shops.
When the joint is thick, the stack is deep, or the backing is far from the face, this Würth #8 x 3" flat head assembly screw gives you the length, point geometry, and head design to drive clean and seat flush — 1000 screws to the box, ready for whatever the production schedule demands.
Sold In: 1000 Each
