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The Würth #8 x 1-5/8 inch flat head assembly screw is a coarse-thread, zinc-plated fastener designed for wood panel joinery, cabinet box construction, and general shop assembly. The 1-5/8 inch length gives enough thread engagement for typical 3/4-inch panel-to-panel connections without over-penetrating the opposite face.
At 1-5/8 inches, this screw is a natural fit for joining two layers of 3/4-inch sheet goods — the kind of connection that comes up constantly in cabinet box construction, rail-to-panel attachment, and shop-built jig assembly. It drives deep enough to grip both panels without breaking through the back face. The Type 17 Auger Point starts cleanly without pre-drilling in most softwoods and plywood, so assembly moves faster on the bench or at the install site. The flat head with nibs seats flush in the panel surface as the screw reaches torque, leaving a finished result that requires no additional countersinking or finishing work for interior cabinet applications.
The screw is carbon steel with a zinc electroplate finish. Zinc provides reliable corrosion protection for indoor cabinet shop environments and controlled interior installations — the standard choice when the fastener will be enclosed inside a cabinet box or concealed behind a panel. The flat head carries underhead nibs that relieve wood fibers as the head seats, improving contact and reducing surface tear-out on panel laminates. Coarse thread geometry locks in pull-out resistance in plywood, softwood, and MDF edge-grain applications where the thread has sufficient material to engage.
Cabinet shops building production runs of frameless or face-frame boxes will use this length most often for panel-to-panel and rail-to-panel connections in 3/4-inch stock. Millwork installers keep pail packaging on site because the volume supports full-day install schedules without restocking. The square drive is a strong fit for shops that standardize on a single bit for all their production driving. Pail packaging moves easily around the shop floor or to the job site, keeping the supply close to wherever the work is happening.
Yes. The 1-5/8 inch length gives enough thread engagement to pull a 3/4-inch face panel tight against an edge-grain substrate. The coarse thread performs well in plywood and softwood in this configuration.
The Type 17 Auger Point is designed to self-start in most softwoods and plywood without a pilot hole. In harder stock or when driving near an edge, a pilot hole reduces splitting risk.
In most wood panel materials, yes. The nibs under the head mill the countersink as the screw seats. For harder hardwoods or finished laminates, a light countersink pass first will give a cleaner result.
This screw works in MDF when driven into face or panel connections with adequate edge distance. MDF has low edge-pull-out resistance, so position fasteners well away from panel edges and avoid overtorquing.
No. The zinc finish is suited for dry interior applications. For outdoor or high-humidity environments, choose a screw with a coated or galvanized exterior-rated finish.
A #2 square (Robertson) driver bit. Using a correctly sized bit gives the best engagement and cam-out resistance.
When 3/4-inch panel joinery is the dominant task in the shop, having the right length on hand in volume means less stopping, less sorting, and more consistent results across a full day of cabinet or millwork production.
Sold In: 3500 Each
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 1 Each |  WW90210 Mfr# 0614176153961 1 | #2 x 1" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90220 Mfr# 0614176139961 1 | #2 x 2" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90230 Mfr# 0614176140961 1 | #2 x 3" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90240 Mfr# 0614176142961 1 | #2 x 4" Square Drive Insert Bit, 2 Piece Bit | ||||
Sold in: 1 Each |  WW90260 Mfr# 0614176143961 1 | #2 x 6" Square Drive Insert Bit, 2 Piece Bit |