S-91771A207 8-32 x 2 1/2" 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 for long-lasting performance in harsh environments
• Exceptional tensile strength rated at 80,000 psi ensures reliable fastening under heavy loads and vibration
• Precise flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Optimized drive engagement through Phillips No. 2 drive style provides secure torque transmission and reduced cam-out risk
• Enhanced thread reliability with UNC coarse threading and Class 2A fit for quick assembly and consistent clamping force
• Versatile partial threading design allows for both secure fastening and adjustment flexibility in various applications
• Industry-compliant manufacturing ensures consistent quality and dimensional accuracy across all production batches

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 8-32 UNC flat head screws deliver exceptional performance where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides superior protection against oxidation and chemical exposure, making them ideal for marine equipment, food processing machinery, and outdoor applications. The partially threaded design combined with UNC coarse threading ensures rapid installation and secure fastening in materials ranging from metals to composites. The Phillips drive system with No. 2 size offers familiar, efficient installation while the standardized 82° countersink angle creates clean, flush surfaces critical for aerodynamic components, machinery guards, and precision assemblies where protrusions must be minimized.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNC standards with precise dimensional control throughout the 2½" length. Manufacturing complies with ASME B18.6.3 specifications for consistent quality and performance. The screw meets RoHS 3 (2015/863/EU) compliance for restricted hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety. Material properties include Rockwell B80 hardness and 80,000 psi tensile strength, ensuring mechanical reliability across industrial applications.