Würth #8 x 2-1/4" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Black, 3670000095961 3500 - 3500/Box

Enough Bite For Thicker Stock, Clean Enough For Finished Work

The Würth #8 x 2-1/4 inch flat head assembly screw is a coarse-thread, square-drive fastener built for cabinet and woodworking assembly where the stock is thick enough to demand a longer screw but the finished face still needs a flush, clean result. A Type 17 Auger point, underhead nibs, and a #2 square drive recess work together to make each fastener seat fast and sit flat.

Key Features

• Flat head with underhead nibs mills its own countersink as the screw seats, leaving the head flush without a separate countersink step.
• Type 17 Auger point starts quickly in wood and clears chips through the full drive depth, reducing splitting in dense material.
• #2 square drive recess is designed to hold the screw on a correctly sized bit for controlled, one-handed placement.
• Coarse thread delivers strong pull-out resistance in solid wood, plywood, and cabinet-grade panel materials.
• Black finish keeps fastener heads visually recessive in dark cabinet interiors, painted assemblies, and stained wood.
• 3,500 screws per box suits high-volume production shops running through large quantities on a regular basis.

Where the 2-1/4 Inch Length Earns Its Place

At 2-1/4 inches, this screw reaches through material thicknesses that shorter assembly screws cannot handle without sacrificing thread engagement. That makes it a natural fit for face-frame attachment to a cabinet box, where the screw must pass through 3/4-inch face-frame stock and still bite deep into the box wall behind it. It also works well in built-up panel assemblies, stacked plywood, and drawer box construction with reinforced corners, anywhere the combined stock thickness pushes past what a 1-1/2 or 2-inch screw can do reliably. The coarse thread keeps withdrawal resistance high in wood fiber without requiring a pilot hole in most softwood and mid-density applications.

Black Finish and Flush Seating in Production Work

The black finish on this screw is a practical choice for shops assembling dark cabinet interiors, furniture with stained or painted surfaces, and any application where a silver or zinc-colored head would stand out against the surrounding material. Underhead nibs handle the countersink as the screw drives home, removing the need for a separate countersink operation on each hole. In production environments where seconds per fastener add up, that single-step installation is a real efficiency gain. The Type 17 Auger point contributes to the same goal: the extended flute clears material aggressively, so the screw drives to full depth with less resistance and less risk of blowout near the surface.

Built for Cabinet Shops Running Volume

This screw is packaged at 3,500 per box, which reflects the volume reality of a production cabinet shop rather than a renovation job or occasional install. Shops assembling dozens of cabinet carcasses a week, face-framing in hardwood or softwood, and building drawer boxes in quantity will move through fasteners at a pace where a jar or small box becomes a restocking problem. The square drive adds a practical advantage here: the recess holds the screw on a correctly sized bit during placement, which speeds up driving on interior surfaces and tight corners where repositioning a dropped screw costs time. For shops using square drive bits consistently, this screw fits naturally into an existing driver setup without a tool change.

Common Questions

The Right Screw for Deeper Joints, Cleaner Results

When the joint calls for more thread engagement than a shorter fastener can deliver and the finished surface still needs a flush, recessive head, the Würth #8 x 2-1/4 inch flat head assembly screw covers both requirements in a single drive.