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This Würth #8 x 1-5/8-inch flat head assembly screw is built for cabinet box assembly, carcass joinery, and general woodworking where the stock is in the 3/4-inch range. The coarse thread, Type 17 Auger point, and flat head with nibs work together to seat cleanly and pull joints tight in a single pass.
At 1-5/8 inches, this screw is well matched to joining standard 3/4-inch cabinet panels face to face or edge to face, where the screw needs enough thread engagement in the second piece without punching through the far side. It handles shelf pin strips screwed into cabinet sides, back panel attachment to the cabinet box, and drawer box assembly in 1/2-inch to 5/8-inch material. For shops running consistent panel thicknesses, a dedicated box of this length removes the guesswork of mixing lengths at the bench.
The flat head seats flush with the panel surface when driven into a pre-drilled countersink, and the underhead nibs mill the surrounding wood as the head approaches the surface, so a separate countersink bit pass is often not needed in softer wood-based panels. The Type 17 Auger point features a fluted tip that clears chips ahead of the thread, which keeps driving torque manageable in hardwood plywood and reduces the tendency to split thinner edges. The black finish keeps head visibility low against dark interior finishes without requiring a touch-up step after installation. This screw is for dry indoor cabinetry and woodworking applications.
Production cabinet shops running a consistent 3/4-inch panel thickness will find the 1-5/8-inch length repeatable across most carcass joints, so a single box stays in the driver most of the day. Custom furniture builders and finish carpenters use it where the head needs to disappear into the interior of a case. The 1,000-piece count supports sustained shop use and reduces reorder frequency on a commonly consumed size.
The 1-5/8-inch length gives the screw roughly 7/8 inch of thread engagement in the second panel after passing through 3/4-inch stock, enough to pull the joint tight without breaking through the far face on most standard cabinet panels.
In softer panels like MDF and particleboard, the underhead nibs often mill a clean seat on their own. In harder materials like solid wood or dense plywood, a quick countersink pass helps the head sit flush without splitting the surface layer.
The Type 17 Auger point has a fluted tip that cuts wood fibers and ejects chips as the screw drives in. This lowers driving torque, reduces splitting near edges, and helps the thread engage cleanly without pushing material out of the way first.
This is a coarse-thread screw with a flat head. Coarse thread provides strong pull-out resistance in softwood, plywood, MDF, and particleboard, but fine thread is generally preferred for hardwood face-frame joinery to prevent splitting in dense grain. For hardwood face frames, confirm the thread type matches the material before driving.
Yes, the drive accepts a standard #2 Phillips bit. Best results come from a bit that is in good condition and sized correctly to the recess — a worn or undersized bit increases the chance of cam-out.
When the job runs on 3/4-inch stock and cabinet interiors need a clean, low-visibility result, the 1-5/8-inch length of this Würth flat head assembly screw fits without adjustment or compromise.
Sold In: 1000 Each
