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The Würth #8 x 2-3/8" Flat Head ASSY Screw is a coarse-thread assembly screw built for cabinet carcass construction, casework, and wood panel joinery where extra length is needed to bridge thick stock or secure a deep, solid connection. It features an RW20 drive, sharp point, flat head with nibs, and a zinc finish, and comes boxed in quantities of 250.
Most cabinet assembly jobs are served by shorter screws, but certain situations call for the additional reach this 2-3/8" length delivers. Fastening through a thick face-frame member into a cabinet side, securing a panel assembly with multiple laminated layers, or connecting a cabinet component where the joint depth exceeds what a 2" or shorter screw can fully engage — these are the moments this screw is sized for. The coarse thread works through solid wood, plywood, MDF, and particleboard, pulling the joint tight with good holding power throughout the full thread engagement. Shops that build heavier carcasses or work with thicker stock will find this length handles those assemblies without the need to switch to a longer, heavier fastener.
The RW20 drive is a Würth proprietary recess with a deeper pocket and broader wing contact than standard star or square drives. In production use, that translates to a more stable bit fit, better torque delivery, and less wear on bits over a long run of fasteners. The flat head includes underhead nibs that cut into the surface as the screw seats, relieving material around the head and allowing it to countersink cleanly without a separate boring step. This combination keeps the head flush in finished cabinet interiors, laminated panels, and hardwood components where a proud or ragged head would require extra work to correct.
Cabinet shops building frameless boxes with thick sides, millwork teams joining multi-layer panels, and finish carpenters securing thick hardwood components will get the most out of this screw. It is an indoor fastener — the zinc finish is well matched to climate-controlled shop and residential environments, not exterior or high-humidity conditions. The box of 250 suits production runs and bench work alike, giving enough quantity for a full cabinet run without over-ordering for occasional use.
When the joint depth, panel thickness, or layered stock exceeds what a 2" screw can fully grip, the extra 3/8" of thread engagement makes a meaningful difference in holding power. It is the right choice when you need the threads to reach fully into the receiving member rather than stopping short.
In most softwood, plywood, and engineered panel applications the sharp point self-starts without a pilot hole. For dense hardwoods or fastening very close to an edge, a pilot hole reduces the risk of splitting.
The RW20 is a Würth proprietary drive. It requires an RW20 bit — not a standard Torx or star-drive bit. The RW20 bit covers ASSY screws from 3.5 mm to 5 mm in diameter, so one bit handles multiple sizes in this family.
No. The zinc finish on this screw is suited to dry indoor environments. For exterior work or contact with pressure-treated lumber, a screw with a corrosion-resistant coating rated for those conditions is the right choice.
The nibs are small milling ridges on the underside of the head. As the screw seats, they cut into the surrounding material and allow the head to countersink flush without a separate countersink operation — especially useful in hardwoods and laminates where a clean, flush head is important.
When the job calls for a screw that reaches beyond what standard lengths provide, the Würth #8 x 2-3/8" ASSY Flat Head delivers the depth, drive quality, and clean seating that cabinet and woodworking shops rely on for consistent results in thick-stock assembly.
Sold In: 250 Each
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 10 Each |  WW06147020 Mfr# 061470 20 961 10 | RW20 ASSY Insert Drive Bit |
