Würth #8 x 2-1/4" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Black, 3670000095961 1000 - 1000/Box

Wurth #8 x 2-1/4 Assembly Screw For Wood

Wurth #8 x 2-1/4 flat head assembly screw gives installers a case hardened fastener sized for common woodworking joins where a #8 screw and 2-1/4 inch length are specified. The flat head design seats flush in a countersunk hole, which helps parts pull tight without leaving a head proud of the surface. The coarse thread configuration engages wood fibers quickly, so the screw bites fast in typical woodworking materials. A #2 square drive interface matches commonly used square bits, supporting positive engagement between bit and screw head. The Type 17 auger point is engineered to start into wood rapidly, which reduces wandering at the start of the drive. The black finish matches applications that call for a dark fastener, helping hardware blend visually in shadow lines or behind dark components.

Key Assembly Screw Details That Support Work

• The #8 screw size and 2-1/4 inch length give a balanced combination of shank diameter and reach, so installers can draw components together while staying within the dimensions often used in woodworking assemblies.
• The flat head style is designed to sit flush in a countersunk recess, which lets connected parts close tightly and keeps the head from projecting where it could interfere with adjacent parts or finished surfaces.
• The coarse thread profile is intended to cut into wood efficiently, so the screw advances with fewer turns and gains holding power in typical cabinet and woodworking substrates.
• The Type 17 auger point is formed to penetrate wood quickly, which supports easier starts and helps the screw follow the intended line into the workpiece.
• The #2 square drive requirement aligns with widely available square drive bits, which promotes consistent bit engagement and can reduce cam-out when driving the screw under load.
• The case hardened construction creates a hardened outer shell on the screw, which supports resistance to deformation at the head and threads when driven firmly into dense areas.
• The black finish provides a dark appearance on the head, which suits projects where a black fastener is preferred to visually recede against darker materials or hardware.

Installation Behavior Of The Square Drive Screw

The Wurth assembly screw uses a #2 square drive, so the bit seats into a defined recess, supporting firm torque transfer during installation. The Type 17 auger point is formed to cut its way into wood, which means the screw begins engaging material as driving starts. The coarse thread takes hold quickly along the lower portion of the shank, so the screw draws mating parts together as it advances. The flat head is shaped for countersunk use, letting the head pull into a tapered hole until it sits level with the surface. Case hardened construction keeps the head and threads resistant to wear while torque is applied, which is important when driving into denser sections of a woodworking assembly.

How This #8 x 2-1/4 Screw Fits Wood Projects

Where This Coarse Thread Assembly Screw Performs

The Wurth #8 x 2-1/4 flat head assembly screw is dimensioned so the shank can span typical joint lines in woodworking while leaving thread engagement in the receiving material. The coarse thread pattern is suited to wood-based substrates, where a more aggressive thread form helps develop holding strength. The Type 17 auger point is tailored to starting in wood, so the screw works in common woodworking tasks where a pointed fastener is needed to advance cleanly into the grain. The black finish supports use in applications that specify dark fasteners, such as projects using dark-toned components. The #2 square drive fits square bits often stocked in woodworking shops, keeping the interface consistent with existing driving tools.

Details That Support Repeatable Fastener Results

The case hardened construction of this assembly screw provides a hard surface on the head and threads, so repeated firm drives maintain the recess shape and thread profile for consistent behavior. The flat head geometry helps each screw seat to a predictable depth within a countersink, giving a uniform flush finish across multiple fasteners. The coarse thread and Type 17 auger point combination means each screw starts into wood in a similar way, allowing installers to expect comparable bite and advancement from piece to piece. The #8 diameter and 2-1/4 inch length stay constant across the box, so every screw contributes the same reach and clamping potential within an assembly. The black finish keeps the visible head color consistent wherever these screws are used on a project that calls for a dark appearance.

Common Questions About This Wurth Assembly Screw

Selecting This Screw For Wood Assembly Tasks

The Wurth #8 x 2-1/4 flat head assembly screw combines a coarse thread, Type 17 auger point, and #2 square drive in a case hardened construction. The black flat head is configured for countersunk use in wood-based work. For projects calling for a #8 x 2-1/4 black coarse thread screw with a Type 17 point and square drive, this Wurth assembly screw aligns with those requirements.