S-95452A121 Length 4" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide steel construction for extended service life in demanding woodworking environments
• Enhanced torque transmission through external hex head design allowing for secure installation with standard tools
• Optimal wood fastening performance with thread forming technology that creates strong, permanent threads without pre-drilling
• Secure partial threading design provides maximum holding power while minimizing wood splitting
• Right-hand threading ensures standard installation compatibility and reliable fastening performance
• Precise dimensional control with 9 threads per inch and 0.313" diameter for consistent, reliable connections
• Extended thread engagement with 2½" minimum thread length for superior pull-out resistance in wood applications

Professional Applications & Engineering Value

These black oxide steel wood screws are engineered specifically for professional woodworking applications where durability and reliability are paramount. The thread forming technology eliminates the need for pre-tapping by displacing material to create permanent, high-strength threads in wood substrates. This design prevents stripping and ensures consistent clamping force throughout the screw's service life. The external hex drive system provides superior torque transmission compared to conventional screw heads, reducing cam-out and enabling higher installation forces. With their partial threading configuration and pointed tip, these screws deliver optimal performance in structural wood connections, furniture manufacturing, and timber construction projects where vibration resistance and long-term integrity are critical requirements.

Specification Summary & Compliance

These 5/16" x 4" wood screws feature inch system measurements with a thread diameter of 0.313" and 9 threads per inch configuration. Manufactured to ASME B18.2.1 specifications for dimensional accuracy and performance standards. The products are fully RoHS 3 (2015/863/EU) compliant and meet REACH (EC 1907/2006) requirements for environmental and safety regulations. The black oxide surface treatment provides additional corrosion protection while maintaining the mechanical properties of the underlying steel material.