S-91087A247 5/16"-18 x 3" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel coating, extending service life in demanding industrial environments
• Enhanced torque transmission and reduced cam-out through Torx T40 drive system for faster, more secure installations
• Exceptional holding power in sheet metal and wood achieved through thread forming design that creates strong, permanent connections
• Reliable fastening in various materials with UNC coarse threads ensuring quick engagement and reduced cross-threading risks
• Flush, professional finish enabled by 82° countersink angle and flat head design for clean surface applications
• Optimized for industrial durability with partial threading providing superior pull-out resistance in wood applications
• Compliance with global environmental standards including RoHS 3 and REACH for responsible manufacturing practices

Professional Applications & Engineering Value

Engineered for demanding wood and sheet metal applications, these black-phosphate steel Torx screws deliver exceptional performance where vibration resistance and long-term reliability are critical. The thread forming design eliminates the need for pre-tapped holes while creating stronger, more durable connections that won't loosen under stress. The T40 drive system provides superior torque transmission, reducing installation time and preventing tool slippage that can damage work surfaces. With UNC coarse threads and 3-inch length, these screws offer deep penetration and maximum holding power in construction, furniture manufacturing, and industrial assembly applications where joint integrity is paramount.

Specification Summary & Compliance

Manufactured to precise dimensional standards with UNC coarse threads (5/16"-18) and Class 2A thread tolerances for consistent performance. Features include partial threading with minimum 1½" thread length, standard 82° countersink angle, and 0.6" head diameter for proper seating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors while maintaining exceptional corrosion resistance through black-phosphate surface treatment.