S-94070A107 4-40 x 5/16" ASME B18.6.3 Brass Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass material, ideal for humid or corrosive industrial environments.
• Excellent durability and strength with Rockwell B40 hardness and 50,000 psi tensile strength for reliable, long-lasting fastening.
• Secure and efficient installation thanks to the No. 1 Phillips drive and fully threaded coarse UNC pattern, reducing assembly time.
• Precise thread fit (Class 2A) ensures smooth engagement and consistent performance in repetitive applications.
• Broad regulatory compliance with ASME B18.6.3, RoHS 3, and REACH, meeting strict industry and environmental standards.
• Versatile pan head design provides a low-profile, rounded finish for applications where protrusion is a concern.

Professional Applications & Engineering Value

This 4-40 UNC brass machine screw with a pan head and Phillips drive is engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The brass material offers inherent resistance to rust and oxidation, making it suitable for electrical enclosures, marine equipment, and plumbing systems. Its coarse thread (UNC) and fully threaded design enable quick, secure fastening in soft materials or where disassembly is frequent. The rounded head profile minimizes snagging and provides a clean appearance, while the Class 2A thread fit ensures reliable performance in automated or high-volume production lines, reducing downtime and maintenance costs.

Specification Summary & Compliance

This screw features a 4-40 UNC thread size with Class 2A thread fit for precise dimensional accuracy. It complies with ASME B18.6.3 manufacturing standards, ensuring consistent quality and interchangeability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in restricted substance-sensitive applications.