S-97124A110 4-40 x 3/8" ASME B18.6.3 Aluminum Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior strength-to-weight ratio from 2024 aluminum construction, providing 50,000 psi tensile strength for demanding applications without adding unnecessary bulk
• Precise Class 2A thread fit ensures smooth installation and reliable engagement in coarse UNC threading for faster assembly operations
• Optimized Phillips drive design with No. 1 drive size offers secure tool engagement and reduced cam-out risk during installation
• Standard 82° countersink angle allows for flush mounting in various materials while maintaining structural integrity
• Full threading along the 3/8" length provides maximum grip range and adjustment flexibility in assembly applications
• Rockwell B55 hardness rating delivers excellent wear resistance and durability in industrial environments
• Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

These 4-40 UNC flat head screws manufactured from 2024 aluminum address critical engineering challenges in weight-sensitive applications where corrosion resistance and structural integrity are paramount. The fully threaded design with coarse UNC threading provides superior holding power in materials where fine threads might strip, while the standard 82° countersink angle ensures seamless flush mounting in aerospace components, electronic enclosures, and precision machinery. The Phillips drive system offers reliable installation torque transfer, reducing assembly time in high-volume production environments. With 50,000 psi tensile strength and Rockwell B55 hardness, these fasteners maintain performance under vibration and load stress, making them ideal for applications requiring repeated disassembly and reassembly without thread degradation.

Specification Summary & Compliance

These flat head screws feature precise Class 2A thread fit per UNC standards with 4-40 thread size and 0.112" thread diameter. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance requirements. The products are fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards, ensuring environmental responsibility and workplace safety. The flat head profile maintains standard dimensions with 0.215" head diameter and 0.067" head height for consistent performance across industrial applications.