S-91400A104 4-40 x 3/16" FF-S-92, QQ-P-35, MS51957-12 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength for reliable performance in demanding applications
• Optimized drive engagement through Phillips No. 1 drive style, providing secure installation and reduced cam-out risk
• Full threading design delivers maximum grip length and uniform load distribution across the entire fastener
• Precision Class 2A thread fit ensures consistent mating with nuts and threaded components for reliable assemblies
• Rounded pan head profile offers a finished appearance while providing adequate bearing surface
• Comprehensive compliance with multiple industry standards including RoHS 3 and REACH for global market acceptance

Professional Applications & Engineering Value

Engineered for precision assemblies requiring reliable fastening solutions, these 4-40 UNC rounded pan head Phillips screws deliver exceptional performance in industrial equipment, electronic enclosures, and machinery components. The passivated 18-8 stainless steel construction provides superior corrosion resistance, making them ideal for applications exposed to moisture, chemicals, or outdoor elements. The coarse UNC thread design ensures quick installation and reliable holding power, while the fully threaded configuration maximizes engagement in various material thicknesses. These screws address critical engineering needs for durable fasteners that maintain integrity under vibration and mechanical stress, supported by their 80,000 psi tensile strength and standardized dimensions for consistent performance across production runs.

Specification Summary & Compliance

This fastener features precision Class 2A thread fit with 4-40 UNC coarse threads and right-hand threading direction. Manufacturing complies with Fed. Spec. FF-S-92, QQ-P-35, and MS51957-12 specifications, ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for restricted substances. The 3/16" length and standardized pan head design provide reliable dimensional stability for precise assembly requirements across industrial applications.