S-91771A176 1-64 x 3/4" 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, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for demanding load-bearing applications
• Precision thread engagement through Class 2A UNC coarse threads providing secure, vibration-resistant fastening
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Enhanced installation efficiency with Phillips No. 0 drive enabling quick, secure tool engagement
• Full-thread coverage across the 3/4" length ensures maximum grip strength and uniform stress distribution
• Regulatory compliance assurance meeting ASME B18.6.3 standards for dimensional accuracy and performance reliability

Professional Applications & Engineering Value

These 1-64 UNC flat head screws deliver critical engineering solutions 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 industrial fasteners ideal for marine, chemical processing, and outdoor equipment applications. The fully threaded design combined with UNC coarse threads ensures maximum holding power in both soft and hard materials, while the 82° countersink angle creates secure, flush-mounted connections that prevent snagging and maintain aerodynamic surfaces. These flat head screws are engineered to withstand vibration and thermal cycling while maintaining consistent clamping force, solving common failure points in machinery and structural assemblies.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (1-64) and standardized dimensions per ASME B18.6.3 specifications. Compliant with RoHS 3 (2015/863/EU) for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. The 3/4" length provides full threading coverage with consistent dimensional accuracy across all critical parameters including head diameter (0.137"), head height (0.043"), and drive size (Phillips No. 0).