Würth #8 x 3" Washer Head Assembly Screw Combo Drive - Sharp Point Turbo Thread Lubricated, 3670000233961 125 - 125/Jar

Combo Drive Assembly Screw For Thick-Stock and Deep Joinery

The Würth #8 x 3" Washer Head Assembly Screw is a lubricated, combo-drive fastener built for cabinet assembly, panel joinery, and wood connections that call for full thread engagement through thicker material. The washer head distributes clamping force broadly across the surface, and the turbo thread drives with noticeably less resistance in softwood, particleboard, MDF, and laminated panels.

Key Features

• 3-inch length provides full thread engagement through thick stock, double panels, and deep butt joints where shorter screws come up short.
• Washer head spreads clamping load over a wide bearing surface, reducing the chance of pull-through in softer or engineered wood substrates.
• Turbo thread is engineered to reduce driving torque and friction, so the screw moves through the material faster with less effort from the driver.
• Combo drive accepts a #2 Phillips or a #2 square bit in the same recess, giving you flexibility when tool options change between the shop and the job site.
• Sharp point self-starts in softwood, particleboard, MDF, and similar panel materials without a pilot hole.
• Lubricated finish further lowers driving resistance, especially useful in production runs where repeated high-torque driving builds heat in the bit and the material.

Where the 3-Inch Length Earns Its Place

Most assembly screws live in the 1-to-2-inch range, where they handle standard panel-to-panel connections and hardware blocking in 3/4-inch stock. The 3-inch version serves a different set of jobs. Stacked panels, thick cabinet sides, deep pocket connections, and through-fastening into a second structural member all demand a screw with enough shank to reach solid material on the far side. The turbo thread keeps driving torque manageable even as the full length of thread engages, which matters when you are driving a dozen of these in sequence on a production cabinet run or a site installation.

Washer Head, Turbo Thread, and Lubricated Finish

The washer head is the right choice when the fastener lands in engineered panels, particleboard, or soft laminated substrates where a smaller head would sink too deep or pull through under load. The broad bearing surface holds the joint without over-driving. Turbo thread geometry cuts the friction load compared to a standard coarse thread, so the driver does not need to work as hard to reach full depth. The lubricated finish adds another layer of slip on the thread surface, making this combination particularly efficient for anyone driving screws in volume. A jar of 125 keeps the supply close at hand without the bulk of a full box.

Shops and Installers Who Reach for This Size

Cabinet shops fastening carcass panels with double-layer sides or extra-thick shelving will find this length useful where a 2-inch screw leaves too little thread in the receiving piece. Furniture makers joining thick substrates benefit from the same reach. On the installation side, contractors assembling face-frame cabinets against walls or attaching cabinet runs to blocking need a screw that clears the first layer and bites firmly into what is behind it. The combo drive accommodates both square and Phillips bits, so the crew does not have to stop and swap drivers when they move from the shop to the truck to the job site.

Frequently Asked Questions

A Dependable Reach When the Joint Runs Deep

When the assembly calls for more length than a standard cabinet screw delivers, this Würth #8 x 3" combo drive washer head screw gives you the thread engagement, the driving efficiency, and the head geometry to fasten confidently through thick panels and into solid material on the other side.