S-97595A259 1/4"-20 x 3/4" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to high-quality brass construction, ensuring long-term reliability in harsh environments.
• Exceptional tensile strength of 50,000 psi provides reliable fastening under heavy loads, reducing the risk of mechanical failure.
• Precision Class 3A thread fit ensures tight, secure connections with minimal backlash for enhanced assembly accuracy.
• Fully threaded 3/4" length with coarse UNC threads allows for quick installation and strong grip in various materials.
• 82° countersink angle and flat head design enables a flush, professional finish, ideal for applications requiring a smooth surface.
• Hex drive (5/32") compatibility offers easy installation with standard tools, improving efficiency in high-volume operations.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, supporting sustainable procurement.

Professional Applications & Engineering Value

This 1/4"-20 UNC brass flat head screw is engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. The brass material naturally resists rust and degradation, making it ideal for marine, electrical, and plumbing systems where durability is critical. With a Rockwell B55 hardness and 50,000 psi tensile strength, it withstands high-stress applications without compromising integrity. The coarse thread design and fully threaded length ensure rapid, secure fastening in soft materials like wood or plastic, reducing assembly time and minimizing loosening from vibrations. Its 82° countersink angle and flat head profile provide a seamless fit in pre-drilled holes, enhancing aesthetics and safety in visible assemblies. By integrating Class 3A thread fit and hex drive compatibility, this screw delivers consistent performance in automated or manual installations, supporting efficiency in manufacturing and maintenance workflows.

Specification Summary & Compliance

This screw features precise Class 3A thread fit per UNC standards, ensuring tight tolerances for reliable engagement. Dimensions include a 1/4"-20 thread size, 3/4" length, and 82° countersink angle, manufactured in compliance with ASME B18.3 specifications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for global supply chains.