S-97124A639 1/4"-20 x 1/2" ASME B18.6.3 Aluminum Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior strength-to-weight ratio with 2024 Aluminum construction, offering 50,000 psi tensile strength for reliable performance in demanding applications
• Precise thread engagement with Class 2A UNC coarse threads ensuring secure fastening and reduced cross-threading risk
• Optimized flush mounting through standard 82° countersink angle and flat head design for smooth surface finishes
• Enhanced drive stability with Phillips No. 3 drive style providing consistent torque transfer during installation
• Full-threaded design delivering maximum grip length and uniform stress distribution across the entire fastener
• Rockwell B55 hardness maintaining dimensional stability and resistance to deformation under load
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 1/4"-20 UNC flat head screws provide exceptional engineering value in applications where weight reduction, corrosion resistance, and structural integrity are critical. The 2024 Aluminum construction delivers excellent strength while minimizing overall system weight, making them ideal for aerospace components, electronic enclosures, and precision machinery. The fully threaded design ensures maximum holding power across the entire engagement length, while the 82° countersink angle creates seamless surface integration. The Phillips No. 3 drive offers reliable installation with standard tools, and the Class 2A thread fit guarantees consistent performance in high-vibration environments. These industrial screws solve common fastening challenges by combining lightweight durability with precise engineering tolerances for demanding applications.

Specification Summary & Compliance

These flat head Phillips screws feature precise 1/4"-20 UNC coarse threads with Class 2A thread fit tolerances ensuring reliable engagement. Manufacturing complies with ASME B18.6.3 standards for dimensional accuracy and performance. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry requirements for hazardous substance restrictions.