S-94559A518 1/4"-20 x 1" Aluminum Oversized-Flange Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance and lightweight performance with 6061 aluminum construction, ideal for applications where weight reduction and durability are critical
• High tensile strength of 40,000 psi ensures reliable load-bearing capacity and structural integrity in demanding industrial environments
• Rockwell B40 hardness provides excellent resistance to wear and deformation, extending the fastener's service life
• Flanged design with 0.797" diameter eliminates the need for separate washers, distributing clamp load evenly and speeding up assembly
• 5/32" hex drive allows for secure, high-torque installation with standard tools, reducing the risk of stripping
• Class 2A thread fit with 1/4"-20 UNC coarse threading ensures easy engagement and reliable performance in high-vibration applications
• Full compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for regulated industries

Professional Applications & Engineering Value

Engineered for precision and reliability, these 6061 aluminum rounded head screws with 1/4-20 UNC coarse threading address common industrial challenges such as material compatibility and assembly efficiency. The flanged button head design not only enhances aesthetics but also provides a larger bearing surface, preventing surface damage and reducing installation time. With a fully threaded configuration and right-hand thread direction, they offer consistent clamping force in machinery, electronics enclosures, and lightweight structural frameworks. The hex drive ensures secure fastening in high-torque scenarios, while the aluminum material minimizes galvanic corrosion risks when paired with non-ferrous components. Ideal for OEM and MRO applications, these screws deliver long-term value by combining high tensile strength with regulatory compliance.

Specification Summary & Compliance

This screw meets Class 2A thread fit tolerances per UNC standards, ensuring precise engagement and interchangeability. Manufacturing adheres to RoHS 3 (2015/863/EU) with exemption 6(b)-II for lead in aluminum alloys, and is fully REACH (EC 1907/2006) compliant, confirming its suitability for global industrial markets. Dimensions include a 1" length, 0.25" thread diameter, and coarse thread spacing for robust performance.