This Würth #8 x 2-1/2" flat head assembly screw is designed for wood-to-wood fastening where the joint requires more thread engagement than shorter screws provide. The coarse thread, Type 17 Auger point, flat head with nibs, and #2 Phillips drive work together to deliver a clean, flush installation in cabinet casework, furniture frames, and general woodworking assembly.
A 2-1/2" screw reaches through material thicknesses that shorter assembly screws cannot bridge. In cabinet construction, that means attaching a face frame to a 3/4" box side and still driving deep into the substrate, or fastening through doubled panels, blocking, or nailers where a 1-1/2" or 2" screw would run short on thread engagement. The coarse thread bites consistently along the full embedded length, pulling the joint tight and holding it there across repeated use cycles. For furniture frames and shop-built fixtures assembled from multiple layers, the extra reach closes gaps that leave shorter screws just barely threading into end grain or thin backing material.
The milling nibs on the underside of the flat head do the countersink work as the screw drives home. In hardwood face-frame stock, solid wood panels, and most plywood, the nibs mill away material progressively so the head seats flush without tearout or a raised rim around the hole. This is especially useful in visible interior surfaces where a proud head or rough countersink would require additional finishing work before paint or stain. The Type 17 Auger point contributes by removing chips ahead of the thread, so the screw does not stall partway down in denser material.
Cabinet shops assembling face-frame boxes, furniture builders joining stiled frames to panel cores, and finish carpenters fastening blocking or backing into multi-layer assemblies all reach for a screw in this length range. At 2-1/2", this screw handles the spans that come up in production cabinet work without being so long that it risks blowing through a panel back or protruding into a finished interior. The 1,000-count box suits shops that burn through screws steadily enough to warrant buying at volume rather than picking up small packs as needed. The zinc finish is the right call for any dry, climate-controlled interior environment.
Yes. The nibs mill a clean countersink in hardwood as the screw seats, so the head sits flush without a separate countersink drill step. For face-frame joinery specifically, confirm the joint design and stock thickness suit the screw length before driving.
The Type 17 Auger point has a longitudinal flute that clears wood chips as the screw drives. That chip-clearing action reduces the torque required to seat the screw and lowers the risk of splitting in denser wood, especially near edges or in layered assemblies where a standard sharp point would meet more resistance.
No. The zinc finish on this screw is rated for dry indoor environments. Exterior work, high-humidity applications, or contact with pressure-treated lumber calls for a screw with a heavier corrosion-resistant coating such as hot-dip galvanized or a three-layer exterior-rated finish.
The coarse thread and Type 17 Auger point are well suited to solid wood and plywood. In MDF or particleboard, coarse-thread screws perform adequately for general assembly but fine-thread or chipboard-thread designs often provide better pull-out resistance in those lower-density materials.
This screw uses a #2 Phillips bit, the most common size in shop and site kits.
When the joint calls for a 2-1/2" reach and a flush, nib-milled head, this Würth #8 assembly screw covers the application without extra steps or specialty tooling, and the 1,000-count box keeps production moving without supply interruptions.
Sold In: 1000 Each
