S-92480A106 4-40 x 1/4" ASME B18.6.3 Brass Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass material, ensuring long-term reliability in demanding environments
• Exceptional 50,000 PSI tensile strength with Rockwell B50 hardness for reliable performance under mechanical stress
• Precision Class 2A thread fit with UNC coarse threading for faster installation and reduced cross-threading risks
• Optimized 82° countersink angle providing flush mounting and clean aesthetic finish in assembled products
• Full threading design delivering maximum grip strength and uniform load distribution across the entire fastener length
• No. 1 Phillips drive enabling secure tool engagement and efficient installation in high-volume assembly operations
• Comprehensive regulatory compliance including RoHS 3 and REACH for global market acceptance and environmental safety

Professional Applications & Engineering Value

These 4-40 UNC brass flat head screws deliver critical engineering advantages where corrosion resistance and electrical conductivity are paramount. The brass construction prevents galvanic corrosion in electronic enclosures, marine components, and plumbing systems while maintaining excellent non-magnetic properties. The 82° countersink angle and flat head profile create seamless surfaces in precision machinery, reducing drag and improving airflow in aerodynamic applications. With coarse UNC threading and Class 2A fit, these fasteners resist vibration loosening in automotive assemblies and industrial equipment while enabling rapid installation in high-volume manufacturing environments. The fully threaded design ensures maximum engagement in thin materials and plastic components where strip-out resistance is critical.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with precision Class 2A thread fit and UNC coarse thread spacing. These 1/4" length screws feature 0.112" thread diameter and maintain dimensional accuracy throughout production. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for hazardous substance restrictions, ensuring environmental responsibility and global market acceptance. The manufacturing process adheres to strict quality controls to maintain consistent Rockwell B50 hardness and 50,000 PSI tensile strength across all production batches.