S-91520A150 Length 1 5/8" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate coating that protects against rust in humid woodworking environments
• Maximum installation torque thanks to square drive design that prevents cam-out and tool slippage during driving
• Enhanced material engagement through thread-forming technology that creates strong, permanent threads without pre-tapping
• Reduced material splitting with pointed tip and partial threading that concentrates holding power where needed most
• Clean finished appearance with narrow flat head profile that sits flush with wood and composite surfaces
• Optimized for modern materials with specific engineering for both natural wood and plastic-wood composites
• Precise installation guidance with recommended 1/16" drill bit size for perfect pilot holes every time

Professional Applications & Engineering Value

These No. 6 wood screws with black-phosphate steel construction address critical challenges in modern woodworking and composite material assembly. The thread-forming design eliminates the need for separate tapping operations while creating stronger thread engagement than conventional cutting screws. This is particularly valuable in plastic-wood composites where material integrity must be maintained. The square drive system provides superior torque transmission compared to Phillips heads, reducing installation time and preventing damaged screw heads. With partial threading and specific 18 threads per inch pitch, these fasteners deliver concentrated clamping force exactly where needed, preventing joint failure in demanding woodworking applications while the corrosion-resistant coating ensures long-term performance in variable humidity conditions.

Specification Summary & Compliance

These inch-system screws feature precision Class 2A thread tolerances with 0.138" thread diameter and right-hand threading. The manufacturing complies with industry standards for wood screw applications, featuring No. 1 square drive compatibility and 13/16" minimum thread length for consistent performance. The black-phosphate surface treatment provides corrosion protection while maintaining RoHS and REACH compliance for safe use in various applications. The narrow flat head profile and 1-5/8" overall length ensure proper fit and function in both solid wood and composite material assemblies.