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The Würth #9 x 3-1/8" ASSY flat head assembly screw pairs a fine thread with a drill point and milling nibs to deliver clean, controlled fastening in hardwood cabinet components, casework, and engineered panels. The RW20 drive provides a deep, stable bit fit that holds up to the torque of production driving.
The 3-1/8" length gives this screw enough penetration for through-panel connections, thick face-frame stock, and multi-layer assemblies where shorter screws would not reach adequate embedment. Fine thread is the right call whenever the receiving material is hardwood, high-density laminate, or a dense engineered panel — the tighter thread pitch multiplies the contact area and keeps the joint from pulling loose under load. The drill point handles startup without a separate pilot, and the centerpoint geometry resists walking on hard or slick surfaces. For cabinet shops driving screws close to panel edges, that combination of fine thread and drill point reduces the two most common edge-fastening problems: splitting and strip-out.
The flat head sits flush after installation, which matters wherever a drawer box side, cabinet panel face, or finished component needs a clean surface. The milling nibs do the countersink work as the screw is driven, cutting and collecting material so the head seats without a separate boring step. That saves time in production and keeps the countersink consistent across identical parts. The zinc finish provides standard indoor corrosion resistance appropriate for climate-controlled cabinet shops and interior installations. This is an indoor screw — for anything exposed to moisture or treated lumber, a coated or stainless option is the right choice.
Cabinet shops and finish carpenters running hardwood face frames, drawer boxes, and dense panel assemblies will find the fine thread and drill point combination worth keeping stocked. The 3-1/8" length also suits structural panel connections in casework and millwork where the screw needs to pass through one layer and bite deep into the next. The included RW20 bit means the box is ready to run the moment it opens — no separate bit order needed. At 200 screws per box, it is a working quantity that suits mid-size production runs and ongoing installation work without overstocking shelf space.
Fine thread provides more thread contact per inch in hardwood and dense engineered panels, which improves holding power and reduces the risk of the joint pulling loose under load. Coarse thread is better suited to softwood and low-density materials.
In most cabinet and casework materials the drill point handles startup and chip removal without a separate pilot hole. Results depend on material density, edge distance, and panel thickness — in very dense hardwood or close to a narrow edge, a pilot can still help.
The nibs on the underside of the flat head mill a countersink in the material as the screw seats. This lets the head sit flush without a separate countersink operation and produces a cleaner result in laminates and hardwoods than driving without them.
Yes. Each box of 200 screws includes a compatible RW20 bit.
The zinc finish is suited to dry indoor environments. For outdoor, high-humidity, or pressure-treated lumber applications, choose a screw with a corrosion-resistant coating rated for those conditions.
When the job calls for a flat head assembly screw that seats flush, holds tight in hardwood, and keeps the bit engaged through a full production run, the Würth #9 x 3-1/8" ASSY fine-thread drill point screw with RW20 drive covers it — box of 200 with the bit already inside.
Sold In: 200 Each
Quantity | Unit Price | Catalog | ||||
|---|---|---|---|---|---|---|
Sold in: 10 Each |  WW06147020 Mfr# 061470 20 961 10 | RW20 ASSY Insert Drive Bit |
