S-91771A200 8-32 x 1 1/8" 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-term reliability in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness to withstand high-stress applications
• Precision thread engagement through Class 2A thread fit and UNC coarse threading for secure fastening and vibration resistance
• Optimal flush mounting with standard 82° countersink angle and flat head design for smooth surface finishing
• Enhanced driving efficiency with Phillips No. 2 drive for reliable torque transfer and reduced cam-out risk
• Full thread coverage across the entire 1-1/8" length for maximum grip strength and load distribution
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

These 8-32 UNC flat head screws deliver critical performance advantages for industrial applications where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making these Phillips drive screws ideal for marine, food processing, and outdoor equipment applications. The combination of coarse thread spacing and Class 2A thread fit ensures rapid installation while maintaining precise tolerance control. The fully threaded design maximizes contact surface area, distributing mechanical loads evenly to prevent joint failure in high-vibration environments. With their 82° countersink angle and flat head profile, these screws create seamless flush finishes in precision assemblies while the No. 2 drive size provides reliable torque transmission for production efficiency.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features UNC coarse threads with right-hand direction and 8-32 thread size. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Mechanical properties include Rockwell B80 hardness and 80,000 psi tensile strength. Dimensions include 1-1/8" length, 0.312" head diameter, and standard flat head profile with 82° countersink angle.