Würth #8 x 2-1/2" Washer Head Assembly Screw Combo Drive - Sharp Point Turbo Thread Lubricated, 3670000229961 125 - 125/Jar

A 2-1/2 Inch Assembly Screw Built for Deeper Joints and Thicker Stock

This Würth #8 x 2-1/2" washer head assembly screw is designed for cabinet assembly, furniture construction, and wood panel work where the joint depth calls for more thread engagement than a shorter screw provides. The turbo thread, lubricated finish, and combination drive make it a practical choice for production shops and installers driving screws repeatedly through the day.

Key Features

• Washer head spreads clamping load across a broader bearing surface, reducing the risk of pull-through in panels and engineered wood.
• Turbo thread is an aggressive, wide-pitch thread designed to reduce driving torque and pull material together quickly.
• Lubricated finish lowers friction during installation, making the screw easier to drive in dense wood and high-volume production runs.
• Combination drive accepts a #2 Phillips or a #2 square bit in the same recess, so the screw works with either driver on hand.
• Sharp point self-starts in softwood and engineered panels without a pilot hole in most applications.
• Jar of 125 keeps the supply at the bench or on the truck without the bulk of a full box.

Where the 2-1/2 Inch Length Earns Its Place

At 2-1/2 inches, this screw reaches through thicker assemblies that a 1-1/2" or 2" screw cannot fully engage. That extra length suits jobs like fastening a face frame to a deep cabinet box, running a screw through a 3/4" panel and into a solid wood cleat, or securing a stretcher inside a furniture case where the combined stock thickness demands more thread in the material. The washer head seats against the surface without countersinking, which keeps the installation clean and fast when the fastener head will be covered or the joint is interior-facing.

Drive, Thread, and Finish Working Together

The combination drive recess accepts both a #2 Phillips and a #2 square bit, so switching between driver types mid-job does not require changing screws. The square recess is designed to hold the screw on a correctly sized bit for one-handed placement, which matters when working inside a cabinet box or holding a panel in position. The turbo thread pulls material together with fewer revolutions than a standard coarse thread, and the lubricated finish reduces the friction load on the driver throughout a long production run. Together these details support consistent installation without excessive torque on the tool or the material.

Who Reaches for This Screw

Cabinet shops assembling face frames to deeper boxes, furniture builders fastening into thicker solid-wood components, and installers who need a screw that bridges a substantial joint without pre-drilling are the primary buyers for this length. The 125-piece jar suits shops that cycle through a few hundred screws in a session rather than a few thousand, and it fits easily in a tool belt pouch or on a small assembly bench. The screw is suited for dry, indoor wood applications. For outdoor or treated-lumber work, a corrosion-rated fastener is the right call.

Common Questions

The Right Screw for Joints That Need the Reach

When the job calls for a screw that bridges thicker stock and still drives fast, the Würth #8 x 2-1/2" washer head assembly screw delivers the length, thread geometry, and drive flexibility to keep the work moving.