S-91478A722 Length 2 1/2" ASME B18.2.1 Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term durability in various environments
• Maximum torque transfer and easy installation thanks to the external hex drive design, reducing tool slippage and installation time
• Enhanced holding power in wood with thread forming tapping method that creates strong, secure threads without pre-drilling in many applications
• Optimized thread engagement featuring a minimum 1-3/4" thread length for reliable fastening and pull-out resistance in wood materials
• Right-hand, partially threaded design allows for precise clamping force control and reduced wood splitting
• Heavy-duty construction with 1/2" diameter and 2-1/2" length, ideal for demanding wood fastening applications
• Compliance with industry standards ensures consistent quality, reliability, and interoperability in professional settings

Professional Applications & Engineering Value

This heavy-duty wood screw is engineered for demanding wood construction and industrial applications where reliability is critical. The zinc-plated steel material provides excellent corrosion resistance, extending service life in both indoor and outdoor environments. The external hex drive enables high-torque installation without cam-out, while the thread forming design creates strong, permanent threads in wood substrates—eliminating the need for tapping and reducing assembly time. With its 1/2"-13 thread and 2-1/2" length, it delivers superior holding power in structural wood connections, timber framing, and heavy-duty furniture assembly. The partially threaded shank allows for effective clamping, minimizing wood splitting and ensuring secure fastening in various wood densities.

Specification Summary & Compliance

This screw features 1/2"-13 UNC threads with standard inch series tolerances. It meets ASME B18.2.1 dimensional specifications for hex head screws, ensuring interchangeability and proper fit. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted hazardous substances. Manufacturing follows industry standards for zinc-plated steel fasteners, providing consistent performance and reliability in professional wood fastening applications.