S-96640A054 4-40 x 1/4" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under demanding loads
• Precise Class 2A thread fit guarantees smooth installation and secure connections in assembly operations
• Fully threaded design with coarse UNC spacing provides maximum grip and faster driving in various materials
• Standard 82° countersink angle allows for flush mounting, reducing snagging and improving aesthetics
• Phillips drive with No. 1 size offers common tool compatibility and efficient torque transfer
• Compliance with ASME B18.6.3 and environmental regulations ensures quality and safety for professional use

Professional Applications & Engineering Value

These 4-40 UNC flat head screws are engineered to address common industrial challenges, such as corrosion and mechanical stress. Made from Black-Oxide 18-8 Stainless Steel, they resist rust and oxidation, making them ideal for applications in electronics, automotive, and machinery where exposure to moisture or chemicals is a concern. The fully threaded coarse UNC design ensures quick, secure fastening in soft metals or plastics, reducing assembly time and minimizing loosening from vibrations. With an 82° countersink angle and Phillips drive, they provide a sleek, low-profile finish that enhances product durability and safety in high-precision environments, supporting efficient production and maintenance workflows.

Specification Summary & Compliance

This product adheres to Class 2A thread fit and UNC coarse thread standards for consistent dimensional accuracy. It meets ASME B18.6.3 specifications for manufacturing quality and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.