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.
The Würth #8 x 3" Flat Head Assembly Screw is a coarse-thread wood screw built for cabinet assembly, carcass construction, and panel joinery where shorter screws fall short. The combination Phillips and square drive recess, lubricated finish, and flat head with a sharp point make this a production-friendly fastener for shops running high volume through dense or stacked materials.
A 3-inch screw is the right choice when the joint requires thread engagement deep into the receiving member. Fastening a cabinet face frame to a thick plywood carcass, securing a back panel through stacked sheet goods, attaching blocking or nailers inside a cabinet box, or running screws through two layers of 3/4-inch material all call for this length. Shorter screws in these situations leave too little thread in the second member to resist racking or pull-out over time. The 3-inch length eliminates that compromise and keeps the fastener fully engaged through the joint depth.
The lubricated coating on this screw lowers the friction load as the coarse thread pulls through the material. On a 3-inch screw, that matters more than on shorter lengths because the thread is in contact with the substrate for a longer distance before the head seats. Less driving resistance means less heat buildup, less torque demand on the driver, and a lower chance of stripping the recess before the head is flush. The combination drive recess accepts a #2 Phillips or a #2 square bit, which keeps the screw compatible with whatever bit is loaded on the gun. The flat head countersinks cleanly in wood, leaving a flush surface ready for finishing without additional prep.
Cabinet shops assembling face-frame carcasses, millwork teams running nailers and blocking into built-up panels, and contractors securing cabinet boxes to walls or each other all benefit from a high-quality 3-inch assembly screw in volume. At 1,500 per box, this SKU is priced and packed for operations that go through fasteners steadily, not the occasional homeowner repair. The combination drive means a team member running a square-drive gun and another running a Phillips gun can both pull from the same box without stopping to sort fasteners.
When you are fastening through one panel and into a second, a 3-inch screw gives you more thread in the receiving member. For built-up assemblies, stacked plywood, or situations where the first panel is thicker than 3/4 inch, the extra half inch of thread engagement meaningfully improves withdrawal resistance and joint rigidity.
The combination recess accepts a #2 Phillips bit or a #2 square bit. The two drive geometries share the same opening, so either bit can be used without modifying the screw or the recess.
No. The lubricant is a dry-to-the-touch coating that reduces friction during driving. Once the screw is seated, holding power comes from the coarse thread engaging the wood fibers, not from the surface coating.
The sharp point self-starts in softwoods and most engineered panels without a pilot hole. In dense hardwoods or when driving close to an edge, a pilot hole reduces the risk of splitting and improves seating consistency.
This screw is designed for interior wood assembly. For exterior work or wet environments, choose a fastener with a corrosion-resistant coating rated for those conditions.
When the joint is deep and the run is long, the Würth #8 x 3" Flat Head Assembly Screw keeps production moving with the reach, drive flexibility, and pack size that cabinet and millwork shops need.
Sold In: 1500 Each
