S-91087A245 5/16"-18 x 2 1/2" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Phosphate steel coating, extending service life in demanding wood and sheet metal environments.
• Enhanced torque transmission and reduced cam-out thanks to the Torx T40 drive, ensuring efficient installation and minimizing tool slippage.
• Exceptional holding power from the thread forming design, which creates strong, permanent threads in materials without pre-tapping.
• Clean, flush finishes enabled by the 82° countersink angle and standard flat head, ideal for applications where a smooth surface is critical.
• Optimized for quick assembly with UNC coarse threads and a partially threaded shank, providing faster driving and reduced material splitting.
• Broad compatibility with standard H drill bits (0.266" diameter), simplifying the preparation process for professionals.
• Reliable right-hand threading ensures consistent, secure fastening in common industrial and construction applications.

Professional Applications & Engineering Value

Engineered for wood and sheet metal applications, these 5/16"-18 x 2 1/2" Torx T40 wood screws address common challenges like material stripping and weak grip. The Black-Phosphate steel construction offers durability against environmental factors, while the thread forming design eliminates the need for separate tapping, reducing installation time and enhancing joint integrity. With a partially threaded shank, the screw minimizes wood splitting and concentrates holding force where it's needed most. The Torx T40 drive ensures high torque capability, making these screws ideal for high-volume assembly lines and precision woodworking projects where efficiency and reliability are paramount.

Specification Summary & Compliance

This screw adheres to UNC coarse thread standards with a size of 5/16"-18 and a minimum thread length of 1 1/2", ensuring precise fit and performance. Manufactured in the inch system, it features a flat head with standard profile and blunt tip for controlled insertion. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and restricted substance management, meeting global industry requirements for sustainable sourcing.