S-97595A369 1/2"-13 x 1 1/4" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with brass material, ideal for harsh industrial environments and moisture-prone applications.
• High tensile strength of 50,000 psi ensures reliable, long-lasting fastening under demanding mechanical loads.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance for secure assemblies.
• Rockwell B55 hardness offers enhanced durability and wear resistance, reducing the risk of stripping or damage during installation.
• Hex drive design with 5/16" drive size allows for easy, high-torque installation using standard tools, improving efficiency.
• 82° countersink angle and flat head profile enable flush mounting, minimizing protrusion for streamlined and safe surfaces.
• Full threading and coarse UNC thread spacing facilitate quick installation and strong holding power in various materials.

Professional Applications & Engineering Value

This 1/2"-13 UNC brass flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The brass material provides inherent resistance to rust and chemical exposure, making it ideal for applications in marine, plumbing, and electrical systems where environmental factors can degrade fastener integrity. With its hex drive style and coarse thread design, it ensures rapid installation and robust performance in wood, metal, and plastic substrates, reducing downtime in production lines. The flat head profile with an 82° countersink allows for seamless integration into surfaces, preventing snagging and enhancing safety in machinery and equipment. By combining high tensile strength and precise Class 3A thread fit, this screw delivers consistent clamping force and reliability, critical for maintaining structural integrity in demanding B2B settings like automotive assembly and industrial manufacturing.

Specification Summary & Compliance

This screw adheres to strict dimensional and performance standards, including Class 3A thread fit for precise tolerance and UNC coarse thread specifications. It is manufactured in compliance with ASME B18.3 standards, ensuring consistency and interoperability in industrial applications. Additionally, it meets regulatory requirements such as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming its safety and environmental responsibility for global supply chains.