Order by 24/7 by web, contact our sales reps or call by phone.
What you need, when you need it, all in one place.
Most orders ship same day.
Advice and support from knowledgeable professionals.
This Würth #8 x 3-inch flat head assembly screw is built for cabinet assembly, panel joinery, and woodworking connections where material thickness demands a longer fastener. A coarse thread grabs solidly in solid wood and engineered panels, the Type 17 auger point starts clean, and milling nibs under the flat head seat flush without a separate countersink step.
Three inches of shank matters when two substantial pieces of material need to be drawn together and held. Cabinet carcass assembly using thicker panels, attaching a face frame to a deep box side, securing cleats or blocking behind cabinet interiors, or joining stacked sheet goods are all situations where shorter screws simply do not reach enough material to grip reliably. The 3-inch length gives the coarse thread full engagement depth through the near panel and well into the receiving member, so the joint closes firmly and stays there. It is also the right choice when fastening through a stretcher, rail, or stile into a second member without bottoming out short of the thread zone.
The flat head with milling nibs handles countersinking as the screw drives: the nibs mill the wood fibers cleanly so the head seats flush in one motion. In hardwoods like maple and oak this eliminates the separate countersink step that slows production runs. The #2 square drive recess is designed to grip a correctly sized square bit, reducing cam-out under the torque needed to pull a 3-inch screw through thick stock. Zinc plating keeps the shank protected in dry indoor environments and prevents rust staining on finished interior panels. This screw is for interior work; outdoor or treated-lumber applications call for a coated exterior fastener.
A 2,000-piece box suits the pace of a cabinet shop running production. Shops assembling carcasses, millwork teams building out built-ins, and installers who regularly work with 1-1/2-inch or thicker material will find the 3-inch length covers the joinery they hit most often in a day. The consistent head geometry and reliable point make this screw predictable on the driver, which matters when the same fastener runs through hundreds of joints in a shift. Homeowners building a single piece of furniture or a one-off cabinet installation will find the same performance at a smaller scale.
When joining thick panels, a cleat to a box side, or stacked sheet goods, a longer screw puts the coarse thread into more material in the receiving member. That additional thread engagement improves pull-out resistance and keeps the joint tight under load.
No. The nibs on the underside of the flat head cut their own countersink as the screw seats, so the head sits flush in most hardwoods, softwoods, and engineered panels without a separate countersink operation.
A #2 square drive bit. The square recess is designed to hold the screw on a correctly sized bit, which is especially useful when driving long screws at an angle or in confined spaces.
Yes. The coarse thread provides good pull-out resistance in particleboard and MDF. In thin or low-density material, pilot holes near edges will help prevent breakout.
The zinc finish is suited to dry indoor applications. For outdoor work or pressure-treated lumber, use a screw rated for exterior or ACQ-treated lumber exposure.
When the stock is thick, the joint is deep, or the connection needs to hold under real load, the Würth #8 x 3-inch assembly screw gives the thread engagement, head geometry, and drive confidence to get the fastening done cleanly and move to the next joint.
Sold In: 2000 Each
