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The Würth #8 x 1-5/8" flat head assembly screw is a coarse-thread, zinc-plated fastener built for production cabinet shops and woodworking operations that need a reliable, high-volume box for panel assembly and similar joinery in 3/4-inch material. The 1-5/8" length gives enough thread engagement through one panel and into a second without over-penetrating on typical cabinet stock.
The 1-5/8" length is a practical choice for joining two pieces of 3/4-inch cabinet-grade material, where the screw passes through the first panel and reaches deeply into the second. It handles drawer-box assembly, cabinet carcass joinery, panel-to-panel connections, and similar production tasks where a flat-seating, coarse-thread screw is the right tool. The Type 17 Auger Point clears wood fiber from the tip as the screw drives, which matters most in denser plywood faces and hardwood components where a sharp-only point would demand more force and risk splitting near the edge. The flat head with nibs takes care of countersinking on the way in, so no pre-countersink step is needed on most stock.
The screw body is carbon steel with a zinc electroplate finish. That combination covers the full range of dry indoor cabinet assembly: standard plywood, melamine-faced particleboard, solid hardwood components, and MDF panels. Zinc plating provides the galvanic protection expected for interior furniture and cabinetry environments. This is an indoor fastener; for applications involving pressure-treated lumber, outdoor exposure, or high-humidity spaces, a coated or stainless exterior screw is the right call instead.
A box of 5500 is sized for shops where this screw is a daily consumable, not an occasional purchase. Cabinet manufacturers, custom woodworking operations, and millwork teams assembling carcasses or panel goods in volume will work through a box without it sitting on the shelf for months. The square drive geometry is designed to hold the screw on a correctly sized bit, which helps during rapid, repetitive driving where repositioning a dropped screw costs time. Installers finishing out cabinetry on site will find the same benefit when working in tight interior spaces where two-handed screw placement is awkward.
When fastening two pieces of 3/4-inch material face-to-face or edge-to-face, a 1-5/8" screw passes through the full thickness of the near panel and provides about 7/8" of thread engagement in the second piece — enough holding power for a cabinet carcass joint without the tip breaking through the far face.
The Type 17 Auger Point has an extended fluted tip that cuts and evacuates wood fiber ahead of the thread, reducing the torque required to drive the screw and lowering the risk of splitting near edges. A standard sharp point displaces material rather than removing it, which can build up pressure in dense stock.
In most solid wood, plywood, and wood-composite panels, yes. The milling nibs on the underside of the flat head cut a clean seat as the screw is driven to depth, leaving the head flush without a separate countersinking step. Very hard materials or finish-critical applications may still benefit from a pre-drilled countersink.
Yes. The coarse thread and Type 17 Auger Point work in MDF and melamine-faced particleboard. Keep in mind that MDF and particleboard have lower pull-out strength near edges than solid wood or quality plywood, so edge distance and screw placement still matter.
This is a coarse-thread screw with a flat head and auger point, which suits softwood and sheet-goods panel assembly. For hardwood face-frame joinery in maple, oak, or cherry, a fine-thread face-frame screw with a washer or pan head is the more appropriate choice because the fine thread grips hardwood without splitting and the broader head pulls the joint tight.
When 3/4-inch panel assembly is a daily constant in your shop, having 5500 of the right screw on hand means the work keeps moving without a mid-run trip to the supply rack.
Sold In: 5500 Each
