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The Würth #8 x 1-9/16" Flat Head ASSY Assembly Screw brings the full ASSY G4 system to joints where a shorter screw would underrun and a longer one would break through. The 1-9/16" length is well matched to face-frame-to-box attachment, drawer box corners, and panel-to-panel joints in 3/4" material where thread engagement through the full joint depth is the goal. Fine thread, a drill point, milling nibs, and an RW20 drive round out a screw built for clean, repeatable work in hardwoods, softwoods, laminates, and engineered panels.
Length selection in cabinet assembly is not arbitrary. At 1-9/16", this screw reaches through a 3/4" face frame or panel face and buries the threaded portion fully into the substrate behind it, giving the fine thread maximum pull-out engagement without the tip breaking through the back face of a 3/4" panel. That makes it a practical choice for attaching face frames to cabinet boxes, joining drawer box sides at the corner, and fastening back panels or dividers in place. For shops working in hardwood species where a coarse thread would wander under torque, the fine pitch keeps the screw tracking straight and seating consistently.
Each of the three engineered features on this screw addresses a different phase of the installation. The drill point handles entry — its cutting edges start the screw without a pilot hole in most cabinet substrates and clear chips as the thread engages, reducing the radial pressure that causes splitting near edges. The fine thread takes over through the mid-drive, gripping the dense fiber structure of hardwoods and laminates where a coarse thread would feel loose. At seating, the milling nibs under the flat head cut a clean countersink into the face material as the head closes, so the finished surface is flush without requiring a separate countersink operation. In a production environment, that sequence — start, drive, seat — happens in a single pass.
Cabinet shops building face-frame boxes in hard maple, cherry, or oak will find the fine thread and drill point combination handles the dense grain without the pre-drilling step that slows a production line. Installers attaching finished face frames on site appreciate a screw that seats flush in a single motion so touch-up is minimal. Custom furniture makers working in hardwood ply or solid-wood panels get consistent depth on every fastener without adjusting their driver setting between passes. The 500-piece box suits both sustained shop runs and the smaller batches a finish carpenter might work through over several installs.
Fine thread has more threads per inch, which increases grip in dense materials like hard maple, oak, and MDF. Coarse thread is better suited to softwoods and particleboard, where the wider pitch engages more fiber volume. For hardwood face frames and solid-wood panels, fine thread holds more securely and is less likely to spin under load.
In most cabinet materials — including hardwood, softwood, plywood, and laminated panels — the drill point starts cleanly without a pilot hole. In very dense stock or when driving very close to an edge, a pilot hole can still reduce splitting risk. The point is designed to minimize that extra step, not to replace judgment about the material and edge distance.
The RW20 drive requires a Würth RW20 bit. It is not interchangeable with standard Torx or star-drive bits, which will not seat correctly in the RW recess. Using the correct bit protects both the screw head and the driver.
Yes. The drill point and fine thread perform well in laminated particleboard and melamine panels. The milling nibs help the flat head seat cleanly through the laminate face, reducing the chance of surface chipping or a rough countersink around the head.
The zinc finish is suited to dry indoor environments. It is not rated for exterior exposure, high humidity, or contact with pressure-treated lumber. For those conditions, select a screw with a corrosion-resistant coating rated for the environment.
Five hundred screws is enough to carry a shop through a significant run of cabinet boxes or a multi-day install, and the ASSY G4 system's consistent geometry means the first screw in the box and the last one seat the same way — flush head, full thread engagement, no adjustments mid-run.
Sold In: 500 Each
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 10 Each |  WW06147020 Mfr# 061470 20 961 10 | RW20 ASSY Insert Drive Bit |
