The Würth #8 x 2-1/4 inch flat head assembly screw is a coarse-thread wood screw with a Type 17 Auger point, underhead nibs, and a #2 square drive. Sized for cabinet box assembly, carcass construction, and general wood-to-wood fastening where the joint calls for a longer screw.
The 2-1/4 inch length is a practical step up from a 2 inch screw when the joint stacks two thicker panels, when face material sits proud of the substrate, or when the connection needs more thread engagement for load. Cabinet carcass assembly with 3/4-inch material plus a secondary panel, hardwood face-frame attachment to a box side, and interior trim blocking are all situations where this length gives more thread in the receiving member than a shorter screw provides. The coarse thread is well matched to solid wood and plywood; for particleboard or MDF carcass panels, the same length is available in chipboard thread profiles elsewhere in the catalog.
The #2 square drive recess is sized to seat a standard #2 Robertson bit squarely, which matters when driving in tight cabinet interiors where the angle of attack is awkward. The Type 17 Auger point goes beyond a standard Type 17 with a longer, more aggressive flute that handles chip clearing through the full depth of thicker stock. Nibs on the underside of the flat head cut into the surface as the head seats, pulling the countersink flush in one motion. Together these three design elements support clean, consistent installation across a high-volume production run without requiring a pilot hole in most softwood, plywood, and moderate-density hardwood assemblies.
Cabinet shops building face-frame boxes from 3/4-inch plywood or solid wood panels are the primary buyers for this length. The 3500-piece box is sized for production use rather than occasional repair, so it suits shops that move through fasteners regularly. Finish carpenters and millwork installers who need a reliable all-wood interior screw in higher quantities will also find the pack size and length combination useful. Because this is a zinc-finished screw, it is a dry indoor product. It is not suited for pressure-treated lumber, exterior assemblies, or wet environments.
When you are driving into two panels of 3/4-inch material, a 2-inch screw leaves about 1/2 inch of thread in the receiving piece. The 2-1/4 inch length adds another 1/4 inch of engagement, which matters in harder wood species or where the joint sees repeated stress. For single-panel attachment into solid backing, the difference is less critical, but for stacked assemblies the extra length provides noticeably better pull-out resistance.
A standard Type 17 has a single short flute near the tip. The Auger variant extends that flute further up the point, so it keeps clearing chips as the screw penetrates deeper into thick stock. In 2-1/4 inch screws going through stacked panels, the extended flute prevents the chip buildup that can stall a shorter-fluted point mid-drive.
In most softwoods, plywood, and moderate-density panels, yes. The nibs under the flat head mill the countersink as the screw seats. In very hard species like maple or in dense engineered panels, a light pilot countersink can still help the head seat cleanly. The nibs are a time-saver on most standard cabinet materials, not an absolute substitute for a countersink in all situations.
This screw uses a coarse thread designed for solid wood and plywood. Coarse threads perform adequately in particleboard and MDF in many situations, but a chipboard-specific thread profile with deeper thread valleys provides better pull-out resistance in those lower-density materials. For production runs built primarily from particleboard or MDF carcass panels, a chipboard-thread assembly screw is a better fit.
Yes. The #2 square drive handles impact driving well when used with a correctly sized square bit. A worn or undersized bit reduces the holding contact between the bit and the recess, which can lead to cam-out under the higher torque of an impact driver. Use a fresh, correctly sized #2 Robertson bit for best results in production work.
When the joint calls for more thread engagement than a 2-inch screw provides and the work is dry interior cabinet or woodworking assembly, this 2-1/4 inch Würth flat head screw with Type 17 Auger point, nibs, and square drive is a practical, high-volume choice.
Sold In: 3500 Each
