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This Quickscrews #8 x 2-1/2" flat head assembly screw is designed for wood joints where reach matters: attaching cabinet sides to face frames, pulling thick panels together, securing blocking inside a cabinet box, and other assembly tasks where a shorter screw would fall short. The coarse thread, double auger point, lubricated finish, and combo square/Phillips drive work together to keep drives clean and consistent through a full box of 2500.
Most cabinet box assembly falls in the 1-1/4" to 2" range, but several common joints demand more reach. Attaching a 3/4" face frame to a 3/4" cabinet side through a pocket leaves at least 3/4" of thread engagement needed past both panels — a 2-1/2" screw handles that math comfortably. The same length works well for pulling together two layers of 3/4" plywood or MDF used for back panels, blocking, or built-up bases, and for driving through thick drawer-box components into the rear of a cabinet. In production shops running a mix of stock thicknesses, keeping a box of 2-1/2" screws alongside shorter variants covers the joints that shorter lengths cannot reach cleanly.
At 2-1/2", a screw travels through more material before it seats, which makes point geometry and finish more consequential than at shorter lengths. The double auger point has two opposing flutes that remove chips from both sides of the tip simultaneously. That chip clearance reduces the resistance buildup that can stall a driver or cause the screw to wander in dense grain. The flat head nibs handle the countersink without a separate bit change, milling the entry cleanly as the head comes down. The lubricated coating does the rest: it reduces friction along the full thread column so the driver does not have to fight the last quarter-inch of penetration to seat the head flush. Together, these three design elements keep drives repeatable across a long production run.
The 2500-count box is sized for production use. Cabinet shops, millwork operations, and commercial installers who assemble dozens of boxes or face frames in a shift can run through shorter screws in days; a larger count means fewer restocking interruptions. The combo drive keeps the line moving when a square bit wears out mid-run and the backup on the bench is Phillips. This screw is a practical choice for any shop that values bit flexibility and consistent seating across a high-volume assembly workflow.
When you are joining two panels of 3/4" material or driving through a face frame into a cabinet side with additional depth behind it, a 2" screw may not leave enough thread engagement past both layers. The 2-1/2" length gives you the extra reach to pull the joint fully without bottoming out.
A standard Type 17 point has one flute that cuts and clears chips as the screw enters the wood. The double auger point has two opposing flutes, which means it clears chips from both sides simultaneously. In dense or resinous wood, that dual clearance reduces the driving torque required and lowers the risk of splitting near the tip.
Both work. The combo recess accepts a #2 square bit or a #2 Phillips bit. The square drive is generally preferred for production work because it holds more positively in the recess, but the Phillips option is there when that is what is loaded in the driver.
In most wood-based substrates — plywood, MDF, solid softwood, and many hardwoods — the nibs mill a clean countersink as the head seats, so a separate countersink step is not needed. In very hard or brittle materials, pre-drilling a shallow countersink will produce a cleaner result.
The lubricated finish on this screw is designed to reduce driving friction, not to provide corrosion resistance. This screw is intended for dry indoor woodworking and cabinet assembly. For exterior or high-humidity applications, choose a screw with a galvanized or corrosion-rated coating.
When the assembly calls for reach — stacked panels, thick face-frame stock, or built-up cabinet components — this 2-1/2" screw gives you the thread depth to pull the joint together cleanly and hold it.
Sold In: 2500 Each
