Würth #8 x 2-1/2" Flat Head Assembly Screw Phillips Drive - Type 17 Auger Point Coarse Thread Zinc, 3670000085961 2500 - 2500/Box

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

#8 x 2-1/2 flat head assembly screw describes a screw size that fits typical assembly work where a #8 diameter and 2-1/2 inch length are required, so installers can match length to standard construction layouts without guessing. The product is identified as a flat head assembly screw, which lets the head seat flush in countersunk holes, keeping surfaces smooth for parts that need to sit tight against each other. The screw uses a Phillips drive, so standard #2 Phillips drive bits work with it, keeping tool changes minimal across repetitive fastening runs. Coarse thread is specified, which means the threads bite quickly into softer materials, helping pull parts together with fewer turns of the driver. The description notes finishes listed below, tying this version to a zinc finish that supports typical indoor woodworking and shop environments where standard protected steel fasteners are used.

Key Assembly Screw Details For Daily Work

• The listing identifies a Wurth #8 x 2-1/2 flat head assembly screw, giving installers a specific fastener for projects laid out around this common size so repeated jobs can be set up around a known, repeatable dimension.
• The screw uses a Phillips drive with #2 Phillips drive bits, so crews can drive these screws with widely used bits, reducing tool changes and helping maintain speed on cabinet, fixture, or general assembly lines.
• Coarse thread is specified for this assembly screw, allowing the threads to advance quickly into material and draw components together efficiently, which is useful when fastening into typical substrates used in woodworking environments.
• The description states that this screw is case hardened, giving the fastener a hardened outer layer that supports driving into material without deforming the head as easily, which helps maintain bit engagement over many installations.
• A zinc finish is noted in the description through the ZNC reference, tying the screw to a zinc-coated surface that supports use in typical interior settings where fasteners are expected to resist ordinary handling and shop conditions.

Assembly Screw Fit, Drive, And Thread Details

The screw size is described as #8 x 2-1/2, so the shank diameter and length are fixed for that dimension, which lets installers plan pilot hole depth and layout spacing around a consistent fastening point. The head is described as flat, so it is intended to sit down into a countersunk recess, creating a surface where connected parts can rest closely against each other. The product information states that the screw uses #2 Phillips drive bits, which connects directly to common driver tips found on jobsite drills and impact drivers, simplifying tool setup. Coarse thread is explicitly listed, which gives each turn more pull in materials that accept aggressive threads, helping tighten assemblies without excessive drive time.

Where This Wurth Assembly Screw Fits Best

Assembly Screw Role In Woodworking Projects

The category is given as Fasteners|Screws and the product class as Screws, so this Wurth part is positioned as a general screw for assembly work where a #8 x 2-1/2 fastener is specified. The web description explains that 3/4 inch and 1 inch lengths in this line are threaded fully, while all other sizes are threaded two-thirds from the bottom of the screw, which places this 2-1/2 inch size in the group with partial threading. That two-thirds threading concentrates thread engagement toward the tip portion of the screw, allowing the unthreaded upper shank to help clamp two pieces together without the top piece riding on threads. This structure supports assembly situations where an upper component is drawn tightly against a lower component as the coarse thread at the bottom pulls into the substrate.

Details That Support Repeatable Assembly Results

The description notes that the screw is case hardened, which means the exterior of the steel is hardened, helping the head and drive recess stay intact under driving torque, so #2 Phillips bits maintain grip over repeated installations. The zinc reference in the SAP description marks this screw as having a zinc finish, which gives the surface a protective coating during storage and routine interior service, supporting consistent appearance across batches in shop environments. The web description states that the screws use #2 Phillips drive bits, linking this fastener directly to a widely stocked bit size, so installers can keep workflow steady with minimal bit changes. Coarse thread further assists repeatable results by allowing the point and threads to advance quickly into material, so each screw pulls parts together with fewer rotations, which is useful when driving many screws in sequence.

Common Questions About This Wurth Assembly Screw

Selecting This Screw For Assembly Projects

The product name specifies a Wurth #8 x 2-1/2 flat head assembly screw with Phillips drive, Type 17 auger point, coarse thread, and zinc reference, so buyers can match this combination to jobs needing that diameter, length, and drive style. The web description adds that these screws are case hardened and use #2 Phillips drive bits, giving installers a hardened fastener that works directly with standard Phillips tips in common drivers. The note that they are sold in full box quantities only supports planning for project or shop stocking around complete box counts. Selecting this part number ties future repeat orders to the same size, drive, thread style, and finish, keeping assembly setups consistent across jobs.