S-92451A105 4-40 x 3/16" ASME B18.6.3 Brass Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass material, ideal for harsh industrial environments and extending service life.
• Excellent machinability and electrical conductivity of brass allows for easy installation and reliable performance in electrical assemblies.
• High tensile strength of 50,000 psi ensures a secure and durable fastening solution for demanding applications.
• Precision Class 2A thread fit guarantees consistent, reliable engagement and reduces the risk of cross-threading during assembly.
• 82° undercut flat head design provides a flush finish when installed, enhancing aesthetics and safety in finished products.
• Full threading along the 3/16" length offers maximum grip and holding power across the entire fastener.
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to strict industrial and environmental safety standards.

Professional Applications & Engineering Value

These 4-40 UNC brass flat head slotted screws are engineered to address critical needs in precision industries such as electronics, telecommunications, and machinery assembly. The brass material provides inherent corrosion resistance, which is vital for components exposed to moisture or varying temperatures, thereby reducing maintenance and replacement costs. The flat head with an undercut profile and 82° countersink angle ensures a smooth, flush surface upon installation, preventing snagging and improving aerodynamic or aesthetic qualities in enclosures and panels. Combined with a coarse thread spacing and Class 2A thread fit, these screws facilitate quick, reliable installation with standard slotted drivers, minimizing assembly time while maintaining high tensile strength for long-term joint integrity. This makes them an optimal choice for applications requiring robust, compliant fasteners that meet ASME B18.6.3 specifications.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 2A thread fit for consistent engagement and UNC coarse threads per inch for robust holding power. Manufacturing and quality are governed by ASME B18.6.3 specifications, ensuring reliability in industrial use. Additionally, these screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from hazardous substances and safe for various global applications.