S-91478A588 Length 1 3/4" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating for extended service life in demanding wood environments
• Maximum torque transmission through external hex drive design prevents stripping during high-tension applications
• Enhanced holding power with thread-forming technology that creates stronger mating threads in wood substrates
• Reduced wood splitting through partial threading design that minimizes stress concentration
• Optimized wood penetration with pointed tip geometry for easier starting and straight driving
• Industry-standard compatibility with 1/2" head width matching standard wrench sizes for efficient installation
• Reliable performance with right-hand threading following conventional installation practices

Professional Applications & Engineering Value

These 5/16" zinc-plated steel hex head wood screws are engineered to address critical challenges in wood construction and industrial assembly. The thread-forming tapping method eliminates the need for pre-drilled pilot holes in many applications while creating compression-fit threads that significantly enhance pull-out resistance. The external hex drive style delivers exceptional torque capability, preventing cam-out during high-tension fastening in structural wood connections, timber framing, and heavy-duty furniture manufacturing. The partial threading design provides concentrated holding power in the engagement zone while reducing the risk of wood splitting that commonly occurs with fully threaded fasteners. The combination of zinc-plated steel construction and 9 threads per inch optimization ensures reliable performance in both softwood and hardwood applications, from outdoor decking to industrial pallet manufacturing.

Specification Summary & Compliance

These wood screws feature precise 5/16" thread diameter with 9 threads per inch and 1-3/4" overall length, manufactured to exacting dimensional standards. The fasteners comply with ASME B18.2.1 specifications for hex head screws, ensuring interchangeability and reliable performance. Environmental and safety compliance is verified through RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) compliance for chemical safety standards, making them suitable for regulated industrial applications.