S-91478A593 Length 2 1/2" 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 applications
• Enhanced installation efficiency through external hex drive design allowing high-torque application
• Maximum holding power achieved through thread forming design that compresses wood fibers without pre-drilling
• Optimized thread engagement with 9 TPI configuration providing superior pull-out resistance in wood materials
• Partial threading design ensures concentrated holding force at the engagement point while reducing installation torque
• Heavy-duty construction with 5/16" diameter and 2 1/2" length for structural wood connections
• Reliable performance backed by compliance with industry standards and environmental regulations

Professional Applications & Engineering Value

These zinc-plated steel wood screws are engineered specifically for heavy-duty wood construction applications where maximum holding power is critical. The thread forming design creates permanent, high-strength connections by compressing wood fibers rather than removing material, significantly increasing pull-out resistance compared to conventional wood screws. The external hex drive accommodates high torque applications, making them ideal for structural framing, timber construction, and industrial wood assemblies. The partial threading concentrates the clamping force at the engagement point while the pointed tip facilitates easier starting. With 5/16" diameter and 2 1/2" length, these screws provide the necessary strength for demanding wood-to-wood connections in construction, furniture manufacturing, and outdoor wood structures where environmental factors require corrosion-resistant fastening solutions.

Specification Summary & Compliance

These wood screws feature 5/16" diameter with 9 threads per inch in right-hand direction and 2 1/2" overall length with 1 3/4" minimum thread length. Manufactured to ASME B18.2.1 standards with inch system measurements, ensuring dimensional accuracy and interchangeability. The screws are RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. The zinc-plated steel construction provides consistent performance while the external hex drive and thread forming design deliver reliable installation characteristics for professional wood fastening applications.