Würth #8 x 2-1/2" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Black, 3670000365961 2500 - 2500/Box

Wurth #8 x 2-1/2 Flat Head Assembly Screw Use

Wurth #8 x 2-1/2 flat head assembly screw gives you a coarse-thread, case hardened fastener for wood assembly work where consistent bite matters. The #8 diameter and 2-1/2 inch length create a familiar format for fastening thicker stock or multi-layer build-ups, which helps keep layout and drill depth predictable across cabinet and woodworking runs. The flat head design lets the screw sit flush in a countersunk hole so surfaces stay smooth for hinges, slides, or finished faces. The square drive recess is sized for #2 square drive bits, so bits seat positively and transfer torque efficiently in production or jobsite work. The Type 17 auger point at the tip helps the screw start into wood by cutting its own lead, which supports straighter driving in many construction materials when aligning parts during assembly. The black finish provides a dark fastener appearance where exposed heads are acceptable in the design.

Key Details That Support Daily Fastening Work

• The #8 diameter with coarse thread gives strong bite in many wood applications, which supports firm joint pull-up on cabinet carcasses, stretchers, and similar assemblies.
• The 2-1/2 inch length reaches through thicker materials or stacked components, which helps tie face frames, build-ups, and blocking together in a single drive.
• The flat head profile allows the head to sit flush in a countersunk hole, which keeps surfaces smooth where hardware, trim, or other components need to sit tight.
• The square drive design works with #2 square drive bits, which helps transfer torque with reduced cam-out during repetitive driving in shop or field conditions.
• The Type 17 auger point helps the screw cut its own starting hole in wood, which supports more controlled starts when pulling parts into alignment.
• The case hardened construction provides a hardened screw body, which supports consistent driving performance across large box-quantity projects.
• The black finish provides a dark head color, which can blend visually where fasteners remain exposed on darker materials.

Installation Behavior, Drive Interface, And Threading

This assembly screw uses a square drive that is sized for #2 square drive bits, so installers can use standard #2 square bits already common in many woodworking and cabinet shops while maintaining positive bit engagement. The coarse thread format works with a #8 diameter to cut into wood aggressively, which draws parts together as the screw advances. A Type 17 auger point at the tip helps the screw establish its path into wood by cutting material as it enters, which supports smoother driving in many wood substrates. For lengths longer than 1 inch, the screw is threaded two-thirds from the bottom, so the unthreaded portion near the head can help clamp parts together as the threaded section pulls into the base material.

Using This Wurth Assembly Screw In Wood Projects

Where This #8 x 2-1/2 Screw Fits In Woodwork

This Wurth #8 x 2-1/2 flat head assembly screw sits in the fasteners and screws class, so it is oriented toward joining wood components in cabinetry and woodworking. The screw length supports fastening through thicker cabinet sides or multiple layers, giving installers room to engage solid material while still using a familiar #8 shank size. Because the head is flat, it rests flush when driven into a proper countersink, which helps when tying interior structures together where surfaces must stay even for hardware and panels. The coarse thread format works with common wood substrates, where the deeper thread profile bites in and pulls parts tight. The black finish on the head gives a darker fastener appearance, which can align with designs that use dark materials or hardware where the head may remain visible. With the square drive recess sized for #2 square drive bits, this screw aligns with many existing driver setups already in the woodworking trade.

Details That Support Repeatable Results And Assembly Flow

The case hardened construction provides a hardened screw body, which supports a consistent drive feel as torque is applied across repeated installations in a production run. The Type 17 auger point at the tip helps the screw cut into wood as it starts, which can reduce wandering at the start of driving and support more accurate placement when drawing two pieces together. For 3/4 inch and 1 inch lengths in this line, the screws are threaded fully, while all other sizes are threaded two-thirds from the bottom of the screw; for this 2-1/2 inch size, that two-thirds threading pattern helps the tip and midsection pull into the base material while the upper shank allows the top piece to clamp tightly. The square drive design that uses #2 square drive bits provides a strong interface, which helps deliver torque efficiently and supports controlled seating of the flat head into a countersink.

Common Questions About This Wurth Assembly Screw

Selecting This Screw For Wood Assembly Runs

This Wurth #8 x 2-1/2 flat head assembly screw combines a coarse thread, Type 17 auger point, square drive sized for #2 square drive bits, and case hardened construction, so it supports repeatable driving in wood assembly work. The 2-1/2 inch length with two-thirds threading from the bottom gives you the reach and clamping behavior needed for thicker cabinet components and multi-layer build-ups. The black flat head offers a flush, dark fastener appearance where heads remain visible on darker materials. When a job calls for consistent assembly performance from Wurth Baer Supply fasteners, this #8 x 2-1/2 option provides a focused choice for wood-based projects.