S-90123A256 Length 4" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for demanding outdoor and marine applications
• Enhanced driving torque and reduced cam-out thanks to the external hex head design for secure installation
• Exceptional holding power in wood achieved through thread forming technology that creates strong, permanent threads
• Reliable partial threading provides maximum grip in the shank section while allowing for material expansion/contraction
• Industry-standard compliance with ASME B18.2.1 ensures consistent quality and dimensional accuracy
• Environmental regulation compliance with RoHS 3 and REACH for safe, sustainable usage in global markets
• Optimized for heavy-duty applications with 4" length and 5/16" diameter providing substantial fastening strength

Professional Applications & Engineering Value

These 316 stainless steel hex head wood screws deliver critical performance advantages in challenging environments where corrosion resistance and structural integrity are paramount. The thread forming design eliminates the need for pre-drilling in many wood applications, creating stronger thread engagement by displacing material rather than removing it. This results in superior pull-out resistance for heavy-duty wood fastening in construction, marine docks, outdoor structures, and industrial wood assemblies. The combination of external hex drive and partial threading provides optimal clamping force distribution while preventing wood splitting, making these screws ideal for demanding applications where vibration resistance and long-term reliability are essential.

Specification Summary & Compliance

Manufactured to ASME B18.2.1 specifications with inch system measurements: 5/16" diameter, 4" length, and 1/2" hex head width. Features right-hand threads with approximately 9 threads per inch and partial threading extending 2.667" minimum. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in industrial applications worldwide. The thread forming tapping method and pointed tip facilitate easy installation while maintaining dimensional precision throughout the fastening system.