S-90920A289 5/16"-18 x 1" ASME B18.6.3 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Enhanced torque transmission with T40 Torx drive design, reducing cam-out and tool slippage during installation
• High tensile strength of 60,000 psi ensures reliable fastening performance in structural and industrial applications
• Optimal flush mounting with standard 82° countersink angle for clean, professional finishes
• Precision threading with Class 2A fit and UNC coarse thread spacing for quick assembly and vibration resistance
• Full threading along 1" length provides maximum grip and adjustment flexibility in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

These 5/16-18 UNC flat head screws with T40 Torx drive are engineered to address critical industrial fastening challenges. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment, and outdoor applications where environmental exposure is a concern. The fully threaded design ensures maximum engagement in various material thicknesses, while the 82° countersink angle creates seamless flush mounting in precision assemblies. The Torx drive system significantly reduces installation issues common in high-torque applications, preventing fastener damage and improving worker efficiency. These industrial screws deliver consistent performance in manufacturing, automotive, and construction applications where 60,000 psi tensile strength and reliable fastening are paramount.

Specification Summary & Compliance

This flat head screw features precision UNC coarse threads with Class 2A thread fit tolerance for consistent engagement and reliable performance. Manufactured in compliance with ASME B18.6.3 specifications, ensuring dimensional accuracy and mechanical properties. The product meets stringent environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, making it suitable for global industrial applications with environmental responsibility requirements.