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The Kreg SML-C250 is a #8 x 2-1/2 inch washer head pocket-hole and face frame screw built for joints in thicker stock, including 1-1/2 inch lumber, stacked cabinet components, and multi-layer panel assemblies. Its coarse thread, Type 17 Auger point, and square drive work together to pull joints tight and keep the bit engaged through the full drive.
At 2-1/2 inches, this screw reaches material thicknesses that shorter pocket-hole screws cannot. It is the right choice when joining 1-1/2 inch dimensional lumber with pocket holes, when attaching a face frame to a cabinet box built from two layers of 3/4 inch panel, or when locking stacked rails and stiles in thicker furniture frames. Pocket-hole joints in 2x stock and multi-layer casework both call for this length to achieve enough thread engagement in the secondary piece for a solid, lasting connection.
The coarse thread on this screw is sized for softwood, pine, plywood, and sheet goods — the materials most commonly found in cabinet boxes and softwood furniture frames. The washer head provides a flat bearing surface that distributes clamping pressure evenly as the screw seats, preventing the head from pulling through the pocket wall. The Type 17 Auger point's extended flute clears chips ahead of the thread as it advances through thick stock, reducing the resistance that builds up in longer drives. Together these three elements make the screw drive cleanly to full depth without the stalling or camming that longer screws can cause in dense material.
Cabinet shops building face frame boxes from dimensional lumber, furniture makers joining 2x stock, and contractors assembling built-ins with thick cabinet carcasses will find this length fills a specific gap in the pocket-hole screw lineup. It handles joints that are too deep for a 2 inch screw but do not call for a specialty structural fastener. The 50-piece box suits shops that use this length selectively alongside other sizes, keeping inventory tidy without over-committing to a size used only on thicker assemblies.
This length is suited for pocket-hole joints in 1-1/2 inch stock and for attaching face frames to cabinet boxes built from stacked 3/4 inch panels, where a shorter screw would not reach enough material in the secondary piece.
Coarse thread provides stronger withdrawal resistance in softwood, pine, plywood, MDF, melamine, and particleboard. Fine thread is the right choice for hardwood face frames; coarse thread is the match for softwood and sheet-good assemblies.
The Type 17 Auger point has an extended fluted tip that clears wood fibers as the screw advances. In thick stock, that chip-clearing action reduces the torque needed to drive the screw to full depth, which matters more as the screw gets longer.
This screw carries a coarse thread, which is best for softwood, plywood, and engineered panels. For hardwood face frames in maple, oak, or cherry, a fine-thread version is the correct choice to avoid splitting and get adequate holding power.
It uses a #2 square drive bit. The square recess is designed to hold the screw on a correctly sized bit, which helps with placement when driving into pocket-hole angles.
When the assembly calls for 1-1/2 inch stock or stacked panel faces, the 2-1/2 inch SML-C250 closes the joint completely and keeps the drive engaged from start to finish.
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