S-97124A120 1/4"-20 x 3/4" ASME B18.6.3 Aluminum Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Lightweight strength with 2024 aluminum construction, offering an optimal strength-to-weight ratio for applications where reduced mass is critical
• Superior drive engagement provided by the No. 3 Phillips drive, ensuring efficient installation and reducing the risk of tool slippage and damage
• Reliable coarse threading with UNC 1/4"-20 and Class 2A fit, enabling quick assembly and excellent resistance to vibration loosening
• High mechanical performance delivering 50,000 psi tensile strength and Rockwell B55 hardness for dependable load-bearing capability
• Flush mounting design with an 82° standard countersink angle, allowing the screw head to sit seamlessly within the material surface
• Full-threaded shank maximizing grip length and providing consistent holding power along the entire 3/4" length
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality, safety, and environmental responsibility

Professional Applications & Engineering Value

These 2024 aluminum flat head screws are engineered to address critical challenges in weight-sensitive and high-vibration environments. The combination of lightweight 2024 aluminum alloy and fully threaded UNC coarse threading provides exceptional strength while minimizing overall system weight—making them ideal for aerospace components, electronic enclosures, and transportation equipment. The Phillips drive with No. 3 size ensures secure tool engagement during installation, reducing cam-out incidents and improving assembly efficiency. With their 82° countersink profile, these screws create clean, flush surfaces that prevent snagging and maintain aerodynamic profiles. The Class 2A thread fit offers optimal clearance for rapid installation while maintaining secure fastening integrity in demanding industrial applications where reliability cannot be compromised.

Specification Summary & Compliance

This 1/4"-20 x 3/4" flat head screw maintains precise Class 2A thread fit tolerances according to UNC standards, ensuring consistent performance across applications. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental regulations for hazardous substance restrictions. Mechanical properties include 50,000 psi tensile strength and Rockwell B55 hardness, validated through quality control processes.