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The Würth #8 x 1-1/8" flat head assembly screw is a lubricated, turbo thread fastener built for cabinet and casework assembly where a short, clean-driving screw is what the job calls for. The 1-1/8" length is a natural fit for joining 3/4" panels, attaching cabinet backs, mounting hardware to finished faces, and other situations where a longer screw would over-penetrate the material.
At 1-1/8", this screw threads fully into 3/4" stock and adds just enough bite beyond it to hold reliably without punching through the opposite face. That makes it well suited for attaching cabinet backs to carcass sides, fastening face-frame components to thin panel edges, securing drawer guide hardware to interior panels, and anywhere a full-length screw would create blowout risk. It also works cleanly for through-fastening two layers of 1/2" sheet material where thread engagement on the back side is tight and controlled thread penetration keeps the joint tidy.
The turbo thread geometry uses an aggressive, wider-pitch profile that moves into the material with fewer revolutions and less resistance than a standard thread. Paired with the lubricated finish, driving is noticeably smoother — particularly in particleboard, MDF, and melamine-faced panels where friction tends to climb as the screw seats. The flat head carries underhead nibs that cut and relieve the countersink as the screw is driven, so the head finishes flush in hardwood, softwood, and engineered panel faces without a drill press or countersink bit in between. These three elements work together to keep assembly moving in production settings where time spent per fastener adds up.
Cabinet shops running production lines use this length to build boxes and attach hardware without changing screw sizes mid-run. Millwork and furniture builders find the 1-1/8" size stays put in thin-stock joinery where longer screws cause problems. Installers working on site with pre-built cabinet components reach for a box of 1,000 knowing they have enough on hand for a full kitchen or bath run. The combo drive recess is a practical advantage in all of these settings: square bits give better torque transfer in a tight cabinet interior, and Phillips bits cover the moments when a square bit isn't within reach.
The lubricant reduces thread friction as the screw seats, which lowers the torque the driver has to deliver. In practice that means less heat buildup in the material, less risk of head strip-out on the last few turns, and faster cycle time when driving hundreds of screws in a session.
No. The nibs on the underside of the flat head mill their own recess as the screw is driven, so the head seats flush in most wood and panel materials without a separate countersink operation. In very hard or dense hardwood, a light pilot countersink can improve seating consistency.
Yes. The combo recess accepts either a #2 Phillips or a #2 square bit. Either size engages the recess fully. The square bit generally delivers better torque transfer with less cam-out tendency, particularly useful when driving at an angle inside a cabinet box.
Yes. The turbo thread and lubricated finish are well matched to engineered panels like MDF, particleboard, and melamine. The wider thread pitch engages the fiber matrix of these materials effectively, and the lubricant helps prevent the friction that sometimes causes MDF to swell or crumble around the fastener as it seats.
This screw is designed for interior cabinet and woodworking assembly. It is not rated for exterior use or prolonged exposure to moisture.
When the job is thin stock, panel-to-panel joinery, or hardware mounting where a longer screw creates more problems than it solves, the Würth #8 x 1-1/8" flat head assembly screw gives production shops and site installers a fast-driving, clean-seating fastener in the count they need to keep work moving.
Sold In: 1000 Each
