This Würth #8 x 1-5/8" flat head assembly screw is sized to work through 3/4-inch cabinet panels and into a second member with thread engagement to spare. A #2 square drive, Type 17 auger point, coarse thread, milling nibs, and Black finish make it a dependable daily driver for cabinet shops and millwork operations running volume assembly.
A 1-5/8" screw is a practical match for cabinet carcass assembly using 3/4-inch sheet goods. Driving through a face panel into an adjoining side, shelf dado, or stretcher, the screw clears the near piece with shank and puts the full thread section into the receiving member. That thread engagement is what holds the joint under load. It also works well for attaching hanging rails and interior blocking inside cabinet boxes, and for securing back panels to face frames where combined stock thickness calls for more length than a shorter screw can deliver without approaching the far face.
The Type 17 auger point does more than start the screw. Its longitudinal flute cuts and ejects wood fibers ahead of the thread, which keeps driving torque manageable in denser panel materials and reduces splitting pressure near the edge of a workpiece. The #2 square drive recess is designed to hold the screw on a correctly sized bit, which matters when both hands are steadying a panel or when the installation angle is awkward. The flat head with nibs handles the finish work: as the head contacts the surface, the nibs mill a clean countersink in the panel face, so the head seats flush without a pre-bored countersink hole. In a production environment, skipping that step on every fastener adds up.
This screw is at home in high-volume cabinet shops and millwork operations where consistency and throughput both matter. The coarse thread handles the engineered materials that dominate cabinet construction: plywood, MDF, melamine-faced particleboard, and similar sheet goods. The Black finish is low-visibility inside finished cabinet boxes and on darker substrates where a zinc screw head would stand out. At 5,500 pieces per box, the pack size is suited to shops running continuous assembly rather than occasional projects.
It clears the full thickness of the near panel and leaves enough thread in the mating piece to hold the joint without risking breakthrough on standard 3/4-inch stock. Shorter screws can leave marginal thread engagement; longer screws risk coming through a thin second member.
A standard #2 square (Robertson) bit fits this screw. The square recess is designed to hold the screw on a correctly sized bit for controlled placement, but that retention depends on using a bit that matches the recess. A worn or off-spec bit will reduce that advantage.
In most softwood, plywood, MDF, and particleboard applications, yes. The milling nibs cut a countersink as the head seats, so the head sits flush without a separate boring step. In very dense hardwood, a shallow countersink can help the head seat cleanly.
The coarse thread is designed for engineered panels and softwood, not hardwood face frames. Hardwood face frames call for a fine-thread screw to grip the denser grain without stripping or splitting. Use this screw for the cabinet box assembly and reach for a fine-thread option when joining hardwood frame members.
The Black finish is suited to dry indoor applications. It is not rated for exterior or high-humidity environments. Use it inside cabinet boxes, on interior woodwork, and anywhere a low-visibility head color is useful.
With 5,500 screws per box, this Würth assembly screw supports the kind of uninterrupted production run where stopping to reorder is the real cost — keeping the line moving is the point.
Sold In: 5500 Each
