S-90988A014 4-40 x 3/8" FF-S-92, MS51957-15 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
• High tensile strength of 80,000 PSI ensures reliable fastening under demanding mechanical loads
• Coarse UNC threading with Class 2A fit provides quick assembly and secure holding power
• Fully threaded design maximizes engagement and distributes stress evenly across the fastener
• Phillips drive (No. 1 size) allows for efficient installation with standard tools, reducing assembly time
• Rounded pan head profile offers a low-profile finish that resists snagging and improves safety
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance in global markets

Professional Applications & Engineering Value

These 4-40 UNC rounded head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The Black-Oxide 18-8 Stainless Steel construction provides excellent resistance to rust and oxidation, making them suitable for outdoor equipment, electronic enclosures, and machinery exposed to moisture. The coarse thread spacing and Class 2A thread fit ensure rapid installation with minimal cross-threading risk, while the fully threaded design enhances grip in various materials. With a Phillips drive, these screws enable precise torque application, reducing operator fatigue in high-volume production lines. Ideal for securing panels, components, and assemblies where durability and regulatory compliance are critical.

Specification Summary & Compliance

This product features a 4-40 UNC thread size with Class 2A thread fit for consistent dimensional accuracy. It meets Fed. Spec. FF-S-92 (MS51957-15) for quality assurance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in industrial applications without hazardous substances.