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The Quickscrews #8 x 1-5/8-inch flat head assembly screw is a coarse-thread, zinc-plated fastener built for cabinet box assembly, panel joinery, and similar interior woodworking where a flush, countersunk result matters. The 1-5/8-inch length gives full thread engagement through 3/4-inch material into a second panel or backing without over-penetrating, making it a practical everyday length for shops running cabinets and casework.
At 1-5/8 inches, this screw lands in a practical range for cabinetry and casework. It drives fully through a 3/4-inch panel and bites deep enough into the adjacent member to hold the joint without risking blowout on the far face. That makes it useful for assembling cabinet boxes, attaching stretchers, securing back panels into rabbets, and fastening interior dividers. Shops building in plywood, MDF, or melamine-faced particleboard will find this length handles the majority of carcass fastening tasks without size changes mid-run.
The flat head seats flush with or just below the panel surface, which matters anywhere the interior of a cabinet needs to be smooth for shelving, hardware, or a finished appearance. The milling nibs on the underside of the head do the countersink work as the screw drives home, so there is no separate boring step required in most wood-based materials. The Type 17 auger point contributes at entry: its longitudinal flute clears wood fibers and reduces the torque spike that can split material near an edge or in a narrow panel strip. Together, the head and point support clean, repeatable installation across a full production shift.
6,000 screws per box is a quantity that suits shops running cabinets in volume rather than occasional one-off builds. The zinc finish and #2 square drive are workhorses: the coating holds up in dry shop environments, and the square recess engages cleanly with standard square drive bits. This screw is for indoor work only. For any application involving moisture exposure, exterior conditions, or pressure-treated lumber, a coated or stainless option is the right call.
It clears a 3/4-inch panel with enough thread engagement in the second member to hold the joint firmly, without the risk of the tip breaking through a thin or show face on the back side.
In most wood-based panel materials, yes. The milling nibs under the flat head cut a seat as the screw drives, pulling the head flush without a separate countersink operation. In very dense hardwoods, a light pilot countersink can help the head seat cleanly.
A #2 square drive bit. The square recess is designed to hold the screw on a correctly sized bit, which helps with one-handed placement and reduces cam-out during driving.
Yes. The coarse thread and Type 17 auger point work well in particleboard, MDF, and melamine-faced panels, which are common substrate materials in cabinet carcass construction.
No. The zinc finish is rated for dry indoor environments. Outdoor work or pressure-treated lumber requires a screw with a coating rated for those conditions.
For shops that build cabinets every day, having the right length screw in volume reduces decisions and keeps assembly moving. The Quickscrews #8 x 1-5/8-inch flat head square drive is that everyday screw for 3/4-inch interior panel work.
Sold In: 6000 Each