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The Würth #8 x 1-3/4" flat head assembly screw is a coarse-thread, zinc-plated fastener built for cabinet carcass construction, panel joinery, and general woodworking assembly where stock thickness calls for a length that reaches through one layer and bites deep into the next. A #2 Phillips drive, Type 17 auger point, and underhead nibs round out the feature set on a screw made to drive cleanly and seat flush in production quantities.
At 1-3/4 inches, this screw is sized for joints where one panel is 3/4-inch thick and thread engagement into the receiving member needs to exceed what a 1-1/4" or 1-1/2" screw delivers. That makes it a natural fit for attaching cabinet backs to dadoed sides, fastening stretchers and nailers inside a carcass, and securing components where a full inch or more of thread engagement in the second piece adds meaningful holding strength. It also works well for face-frame-to-box attachment in softwood or sheet-good construction, where the combined stock thickness calls for extra reach beyond a shorter screw. Because the coarse thread is optimized for fibrous and engineered wood substrates rather than hardwood, reach for this screw when the receiving material is pine, birch plywood, MDF, or melamine-faced particleboard.
The flat head countersinks to flush, which keeps interior cabinet surfaces clean and avoids snags on drawer boxes or sliding components. The milling nibs on the underside of the head do the countersink work as the screw seats, cutting through the surface laminate or wood face without tearing it. The Type 17 auger point handles the entry: the fluted tip shears wood fiber cleanly rather than wedging it aside, which means less splitting near edges and less torque required to reach full depth. In a production environment where a driver is running hundreds of these in a shift, both details translate to fewer rejects and less rework on seated heads.
Cabinet shops assembling frameless or face-frame boxes in volume will get the most from this SKU. The 1,000-count box supports a day or more of continuous assembly without a reorder interruption, and the consistent zinc-plated steel construction means the screw behaves predictably from the first fastener to the last. Finish carpenters and millwork installers who need a reliable general-purpose flat head screw for built-ins, shelving units, and interior casework will find the 1-3/4" length covers a wide range of panel-to-panel and component-to-substrate joints. This screw is for indoor work only. The zinc plating is suited to dry, climate-controlled environments and is not rated for outdoor exposure or contact with pressure-treated lumber.
In most wood-based panels, MDF, and softwood, the milling nibs under the head cut their own countersink as the screw seats, so a separate countersink step is typically not needed. In very hard or dense solid wood, a pilot countersink can help the head sit cleanly.
Yes. Coarse threads grip the fiber matrix of MDF, particleboard, and plywood more effectively than fine threads do in those materials. Fine threads are better suited to hardwood face-frame stock where splitting is a concern and thread-per-inch count matters for holding power.
It can work for attaching softwood or sheet-good face frames to a cabinet box where the combined panel thickness suits a 1-3/4" screw. It is not recommended for hardwood face-frame joinery, where a fine-thread screw with a pan or washer head is the better specification.
A standard #2 Phillips bit. That is the most common bit size in cabinet and woodworking shops, so no specialty tooling is required.
No. The zinc plating on this screw is suited to dry indoor environments. Outdoor exposure or contact with ACQ pressure-treated lumber requires a corrosion-resistant coating rated for those conditions.
When the joint calls for a 1-3/4" flat head screw that seats flush, drives clean, and holds reliably in panels and softwood stock, this Würth assembly screw covers the work without complication. A box of 1,000 keeps the line moving.
Sold In: 1000 Each
