Würth #8 x 2-1/4" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Black, 3670000095961 1000 - 1000/Box

Assembly Screw Sized For Deeper Panel Joinery and Cabinet Box Construction

The Würth #8 x 2-1/4 inch flat head assembly screw brings a Type 17 Auger point, coarse thread, and underhead nibs together in a length that reaches through thicker panel stacks and into solid wood backing. The #2 square drive and Black finish round out a screw built for production cabinet and casework assembly.

Key Features

• Type 17 Auger point with an extended flute that clears chips and starts cleanly in dense or thick wood without a pilot hole in most applications.
• #2 square drive recess designed to hold the screw on a correctly sized bit for controlled one-handed placement.
• Flat head with underhead nibs that mill a clean countersink as the screw seats, leaving the head flush without a separate countersink operation.
• Coarse thread for strong pull-out resistance in softwood, plywood, MDF, particleboard, and similar cabinet materials.
• Black finish for a low-visibility appearance inside cabinet interiors and on concealed faces.
• 1,000 screws per box sized for sustained production runs in a shop or on a commercial install.

Where the 2-1/4 Inch Length Does Its Best Work

At 2-1/4 inches, this screw has enough shank to pass through a 3/4-inch panel face and still achieve meaningful thread engagement in a second member or solid wood nailer behind it. That geometry suits cabinet box assembly where sides, tops, and bottoms join into a back panel or solid corner block, and it handles attaching a finished face panel to a substrate where combined thickness pushes past 1-1/2 inches. The length also works well when fastening into end grain through a face panel, where extra thread depth helps compensate for end grain's lower holding power. For shops running mixed cabinet construction with engineered sheet goods and solid-wood components in the same assembly, this size bridges the gap without reaching for two different screws.

Point, Drive, and Head Working Together

The Type 17 Auger point carries a longer flute than a standard Type 17, which matters when the screw has to travel through thicker combined material before the thread engages the second workpiece. Chip clearance stays consistent through the full drive, reducing the torque spike that can strip a head or split a panel edge. The #2 square recess transfers torque cleanly to that point without cam-out, and the underhead nibs handle countersinking on the way to flush seating. Shops using this screw in melamine-faced particleboard or MDF benefit particularly from the nibs, which cut cleanly through laminate facing and leave a tight, flush seat that joint compound or a shelf clip can cover without prep work.

A Practical Choice for Production Cabinet Shops and Site Installers

Cabinet shops building box-construction kitchen and bath cabinets in volume will find the 1,000-count box practical for a sustained production run. The Black finish blends into interior cabinet panels and keeps fastener heads from standing out on exposed assembly faces. Site installers fitting custom cabinets or built-ins who need a screw that handles variable panel thicknesses without swapping sizes mid-job will find the 2-1/4 inch length versatile across typical casework stack-ups. The coarse thread engages plywood, particleboard, and MDF reliably, so one screw covers most of the engineered-panel combinations that come up in cabinet construction.

Common Questions

The Right Length for the Job Keeps Assembly Moving

When the panel stack calls for more than a shorter screw can reach, the Würth #8 x 2-1/4 inch assembly screw delivers the thread engagement and clean seating that cabinet and casework construction demand, box after box.