Würth #8 x 1-1/2" Flat Head Assembly Screw Square Drive - Type 17 Auger Point Coarse Thread Zinc, 3670000358961 5000 - 5000/Box

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

Wurth #8 x 1-1/2" flat head assembly screw square drive is a case hardened screw that delivers a tough shank and head, which supports demanding fastening tasks where breakage resistance matters on the job. The flat head design seats flush in a countersunk hole, which helps panels draw tight and keeps surfaces smooth for later work. Its coarse thread configuration bites firmly into material, which promotes strong holding power in fewer turns. The screw uses #2 square drive bits, which provides a positive bit engagement that helps reduce cam-out during driving. This #8 x 1-1/2" size is part of a line where 3/4" and 1" lengths are threaded fully and all other sizes are threaded two-thirds from the bottom of the screw, which helps match thread length to typical fastening depths across related sizes.

Key Assembly Screw Details That Support Work

• The #8 diameter with 1-1/2" length establishes a balanced shank size and reach, which suits many fastening layouts where moderate penetration and grip are required without over-penetrating typical stock thicknesses.
• The flat head assembly profile is designed to sit level in a countersunk recess, which allows connected parts to close up tightly and leaves a surface ready for additional components or finishing steps.
• The coarse thread form on this screw is configured for an aggressive bite, which translates turning force into holding power efficiently and supports firm clamping between assembled pieces under load.
• The Type 17 auger point is engineered to start into material with reduced resistance, which helps the screw advance cleanly and supports consistent entry at the target location during repetitive installations.
• The #2 square drive interface matches common square drive bits, which gives the driver tip a stable seat in the recess and helps maintain torque transfer when working through repeated cycles.
• The zinc finish applied to this screw provides a metallic coating on the case hardened steel, which offers a basic protective layer that supports appearance and service life in typical shop and project environments.

Assembly Screw Thread And Drive Details For Fit

The #8 x 1-1/2" flat head assembly screw square drive with coarse thread is sized so its shank thickness and length cooperate with common fastening layouts, which supports predictable embedment depth across repeated joints. Its coarse thread pattern runs along the lower portion of the screw, which focuses the gripping action where it is most needed to clamp components together. The Type 17 auger point at the tip is formed to cut into material as it turns, which helps the screw follow its axis and promotes straighter, more controlled driving. Use of #2 square drive bits matches the recessed drive shape, which maintains firm bit contact during torque application and supports consistent seating of the flat head. The zinc finish over the case hardened body creates a treated exterior surface, which gives the screw a finished appearance while supporting performance in ordinary shop conditions.

How This Wurth Assembly Screw Works In Practice

Where The #8 x 1-1/2" Screw Is Typically Applied

The Wurth #8 x 1-1/2" flat head assembly screw square drive sits in the screws product class within the fasteners category, which places it among components chosen to join parts in woodworking and related assembly work. Its 1-1/2" length offers reach that helps connect pieces where one part must pull tightly against another, while still being short enough for many standard build-ups. The coarse thread zone along the lower two-thirds of comparable sizes in this line focuses gripping action near the tip, which is suited to drawing the far side of a joint tight against the near side. The flat head geometry lets the head bury into a countersunk hole until it is level, which helps parts close fully without a raised head interfering with fit or alignment of adjacent pieces.

The Type 17 auger point configuration on this assembly screw forms a cutting tip, which allows the screw to advance into material while the point removes a path for the threads. This contributes to more controlled driving, which is useful when aligning parts that must stay in position as the screw seats. Case hardening applied to the screw body increases hardness at the surface, which supports the structural integrity of the head and shank under load from driving torque. The #2 square drive recess corresponds to standard square drive bits, which provides a defined pocket for the bit to occupy and supports repeatable torque transfer across multiple installations. The zinc finish carried on this screw coats the exterior, which supports its appearance and helps it perform within the range of environments commonly encountered in woodworking shops and assembly areas.

Why Threading, Point, And Finish Support Repeatable Results

The relationship between thread coverage and length in this Wurth line, where 3/4" and 1" lengths are threaded fully and all other sizes are threaded two-thirds from the bottom, indicates a threading approach intended to place active threads where clamping is most effective, which benefits assembly joints across the available sizes. For this #8 x 1-1/2" screw, that pattern means the gripping threads operate primarily toward the tip, which helps the screw draw components together as the head seats. The Type 17 auger point at the tip cuts as it rotates, which can reduce splitting forces near entry and provides a guided start that helps the screw stay on its driving line. This contributes to consistent alignment when the same hole layout is repeated many times.

The case hardened construction of this assembly screw increases hardness of the outer layer, which supports the head and shank when subjected to the forces of driving with #2 square drive bits. This hardness helps the drive recess maintain its shape under repeated bit engagement, which is important when the torque required to pull parts together is high. The zinc finish provides a metallic barrier on the exterior, which supports resistance to surface wear and oxidation in typical indoor working conditions often found in woodworking and cabinet environments. The combination of a defined #8 diameter, 1-1/2" length, coarse thread, Type 17 auger point, and flat head geometry yields a screw that supports predictable embedment, head seating, and torque transfer, which are key factors in achieving repeatable, uniform assembly results across multiple similar joints.

Common Installer Questions About This Wurth Screw

Choose This Assembly Screw For Sized, Coarse Thread Fastening

The Wurth #8 x 1-1/2" flat head assembly screw square drive combines a defined #8 diameter, 1-1/2" length, coarse thread, and Type 17 auger point, which equips it for fastening where firm clamping and controlled entry are needed. Its case hardened construction and zinc finish support service in woodworking and related assembly settings, while the #2 square drive recess aligns with common bits for practical driving. When selecting screws for assembly work, this configuration offers a clearly specified option within the screws class from Wurth Baer Supply.