S-97595A197 1/4"-20 x 3/8" ASME B18.3 Brass Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with brass construction, ideal for harsh environments and electrical applications
• Exceptional thread engagement and reliability with Class 3A fit and UNC coarse threads for secure fastening in softer materials
• High mechanical strength with 50,000 psi tensile strength and Rockwell B55 hardness for demanding, heavy-duty applications
• Efficient installation and removal with a 5/32" hex drive, providing positive torque transfer and reducing tool slippage
• Flush, professional finish with a standard 82° countersink angle flat head for seamless integration into assembled components
• Full-length threading ensures maximum grip and holding power along the entire 3/8" length
• Guaranteed quality and safety through compliance with ASME B18.3, RoHS, and REACH standards

Professional Applications & Engineering Value

This 1/4"-20 UNC brass flat head screw is engineered to solve critical challenges in industrial assembly, particularly where corrosion resistance and electrical conductivity are paramount. The Class 3A thread fit provides precise, vibration-resistant connections in materials like aluminum or soft alloys, preventing loosening under dynamic loads. Its hex drive design allows for high-torque installation in confined spaces, a common requirement in machinery and electronic enclosures. The combination of 50,000 psi tensile strength and Rockwell B55 hardness ensures durability in structural applications, while the 82° countersink offers a smooth, aerodynamic surface finish, making it ideal for automotive, marine, and high-end consumer electronics where both performance and aesthetics are critical.

Specification Summary & Compliance

This screw adheres to inch system dimensions with a 1/4"-20 UNC coarse thread and Class 3A tolerance for superior fit. Manufacturing and quality are governed by ASME B18.3 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and is REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety regulations for industrial use.