S-91530A425 Length 4" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in humid or outdoor wood applications
• Enhanced torque transfer and reduced cam-out thanks to the square drive design, ensuring secure installation and preventing tool slippage
• Efficient self-tapping capability through thread cutting technology that creates precise mating threads in wood and plastic-wood composites
• Optimal material displacement control with narrow flat head profile that sits flush without splitting delicate materials
• Reduced driving resistance through partial threading design that minimizes friction along the shank while maintaining strong holding power
• Precise pilot hole compatibility with recommended 5/64" drill bit size for clean installation in various wood types
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in commercial and residential projects

Professional Applications & Engineering Value

These No. 9 wood screws deliver exceptional engineering value through their specialized thread cutting technology and 18-8 stainless steel composition. The partially threaded configuration with 14 TPI (threads per inch) provides superior pull-out resistance while reducing driving torque, preventing material stress in wood and plastic-wood composite applications. The square drive system ensures maximum torque transmission during installation, eliminating common issues with screw head stripping. With a 0.177" thread diameter and pointed tip, these fasteners penetrate efficiently without pre-tapping, making them ideal for production environments where speed and reliability are critical. The narrow flat head design creates a clean, flush finish in furniture manufacturing, deck building, and architectural woodworking projects.

Specification Summary & Compliance

These wood screws feature precise inch system measurements including 4" length, 0.177" thread diameter, and 0.25" head diameter with right-hand threading. Manufactured to industry standards for thread cutting screws (Type 17) with partial threading and 2" minimum thread length. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across commercial and residential applications.