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The Würth #8 x 2-1/2" flat head assembly screw is built for cabinet box construction, casework, and wood panel joinery where a longer fastener is needed to pull thick stock together cleanly. A coarse thread, sharp point, lubricated finish, and #2 square drive make this a dependable production screw for shops running high volumes of interior wood assembly.
At 2-1/2 inches, this screw reaches through a face panel and well into the substrate behind it, which matters when assembling double-wall sections, attaching thick face frames to cabinet boxes, or fastening through plywood into a solid wood cleat or ledger. A shorter screw can lose grip in layered assemblies; this length keeps the joint tight. It is also a practical choice for installing cabinet backs into thicker carcass sides or securing shelf cleats where shear load calls for more thread engagement than a 1-1/2" or 2" screw provides.
The screw is steel with a lubricated finish. The lubricant is not a corrosion coating — it is a friction reducer applied to the threads and point that lowers the torque needed to drive the screw through thick or layered stock. In a production setting, that reduction adds up quickly: drivers run cooler, bits last longer, and the screw seats consistently without the pilot blowout that can happen when torque spikes in dense material. This screw is for dry interior work. The flat head is designed to countersink flush, leaving a clean surface ready for finishing without additional prep.
Cabinet shops, millwork facilities, and production woodworking teams reaching for a general-purpose assembly screw in the 2" to 3" range will find this size covers a wide band of everyday joinery. The 2,500-count box is sized for shops that move through fasteners steadily — enough on hand to run a full production day without a parts interruption. This screw is for indoor cabinet and casework assembly. For exterior or treated-lumber applications, choose a screw with a rated corrosion-resistant coating.
The coarse thread is well matched to softwood, plywood, MDF, and particleboard — the materials that make up most cabinet carcasses and casework. It is not the right thread for hardwood face frames, where a fine thread is needed to prevent splitting.
No. The lubricated finish reduces driving friction, not corrosion. This screw is for dry interior applications only. Do not use it in exterior or high-humidity environments.
The sharp point self-starts in many wood-based substrates, but a pilot hole or countersink is recommended when fastening near edges or in denser materials to control splitting and ensure a clean flush head.
The 2-1/2" length gives extra thread engagement in layered or thick assemblies — double walls, thick carcass sides, and shelf cleats — where a shorter screw would lose grip. It is particularly useful when a face panel and substrate together exceed 1-1/2" in combined thickness.
A #2 square drive bit. Using a correctly sized bit is important for reliable seating; an undersized or worn bit will reduce driver engagement and increase the chance of cam-out.
When the job calls for a flat head assembly screw that reaches deep, drives clean, and keeps up with a production pace, the Würth #8 x 2-1/2" square drive screw in a 2,500-count box is stocked and ready to go.
Sold In: 2500 Each
