S-91771A946 8-32 x 1/4" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Precision thread engagement through Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting with standard 100° countersink angle and flat head design for seamless surface integration
• Efficient installation using Phillips No. 2 drive system for quick assembly and reduced tool slippage
• Full-threaded design providing maximum grip length and uniform stress distribution across applications
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards

Professional Applications & Engineering Value

These 8-32 UNC flat head screws deliver critical performance advantages in industrial fastening applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for marine, food processing, and outdoor equipment applications. The combination of coarse UNC threading and Class 2A thread fit ensures rapid installation while maintaining precise tolerance control, reducing assembly time in high-volume production environments. The fully threaded design maximizes surface contact area, distributing clamping forces evenly to prevent joint failure under dynamic loads. With their standard 100° countersink angle, these screws create flush surfaces that eliminate protrusions in machinery and electronic enclosures, addressing both safety and aesthetic requirements in professional engineering projects.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerances for consistent performance. The 8-32 UNC coarse thread configuration ensures reliable engagement in various materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across global markets. Dimensional specifications include 1/4" length, 0.312" head diameter, and Phillips No. 2 drive system for standardized installation procedures.