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The Würth #8 x 1-1/4-inch flat head assembly screw is a coarse-thread, zinc-plated wood screw built for cabinet carcass assembly, face-frame attachment, and panel joinery where the fastener length needs to match the material thickness precisely. The 1-1/4-inch length is a common fit for joining 3/4-inch panels and attaching components where a longer screw would over-penetrate.
Length selection in cabinet and panel work is not arbitrary. A 1-1/4-inch screw gives enough thread engagement for a solid connection into 3/4-inch sheet goods without punching through the far face. That makes this length a natural fit for attaching cabinet backs to panel sides, joining drawer box components, securing shelf cleats, and fastening hardware backing blocks where penetration depth needs to stay controlled. It also works for attaching face frames to 3/4-inch cabinet boxes when the screw is driven at an angle through a pocket or pilot hole.
The coarse thread pattern pulls reliably in particleboard and MDF, which are common cabinet box materials. For hardwood joinery or dense solid-wood face frames, a fine-thread variant is the better choice, since coarse threads in tight-grained hardwood can reduce holding power compared to fine threads in the same material.
The flat head with underhead nibs does two things at once: the nibs mill into the surface as the screw is driven, relieving the material so the head seats flush without requiring a pre-drilled countersink. This matters on finished interior panels and melamine surfaces where a raised or off-center head creates rework. The Type 17 Auger point adds a longer extended flute compared to a standard Type 17, clearing chips more aggressively as the tip threads into the material. The result is less resistance at the point and a cleaner start, which reduces the torque spikes that strip heads or split panel edges during high-volume assembly.
Production cabinet shops building frameless or face-frame boxes benefit most from this combination of length, drive, and point. The 1-1/4-inch size covers a range of repeating joints in a standard cabinet run without switching boxes mid-job. On the install side, finish carpenters and cabinet installers use screws in this size range when fastening interior components, adjusting blocking, or attaching backs and cleats on site. The 1,000-piece box quantity supports both environments: enough to run a full cabinet batch without reordering mid-production, and compact enough to keep on a cart or in a job bag.
The square drive holds up well under the repetitive driving that shop work demands. The #2 recess is designed for a correctly sized square bit, which provides stable engagement and reduces the cam-out that eats into head recesses over a long production run.
A 1-1/4-inch screw driven through one 3/4-inch panel into a second will seat well into the second piece without breaking through the far face, making it a workable choice for that joint. If you need more thread engagement in the second piece, a 1-1/2-inch or longer screw in the same family provides additional bite.
Yes. The coarse thread is well matched to the fiber structure of particleboard and MDF, providing reliable pull-out resistance in the low-density core material common in melamine-faced cabinet panels.
In most softwoods and engineered panels, the milling nibs under the flat head cut the material as the screw seats, allowing the head to come flush without a separate countersink step. In very dense materials, a light countersink may help the head seat cleanly.
The Type 17 Auger point has a longer, more extended flute than a standard Type 17. That extra flute length clears chips more aggressively, which lowers driving resistance and reduces splitting risk, especially in thicker stock or when driving close to a panel edge.
This screw carries a coarse thread, which is optimized for softwood, plywood, and engineered panels. For hardwood face frames in maple, oak, or similar tight-grained species, a fine-thread version in the same family will provide better holding power and reduce the risk of the coarse thread stripping in dense grain.
The zinc finish provides standard corrosion protection suited to dry indoor environments. It is not rated for exterior exposure, high-humidity spaces, or contact with ACQ pressure-treated lumber.
At 1-1/4 inches, this Würth assembly screw covers the joint depth that comes up most often in 3/4-inch panel construction, and the flat head with nibs, Type 17 Auger point, and square drive keep the installation clean and repeatable across a full box of 1,000.
Sold In: 1000 Each
