S-92210A719 1/2"-13 x 1 7/8" ASME B18.3, ASTM F879 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A fit and UNC coarse threading ensuring secure, vibration-resistant connections
• Optimized flush mounting featuring standard 82° countersink angle for seamless surface integration and improved aesthetics
• Efficient installation with 5/16" hex drive providing positive torque transmission and reduced installation time
• Full threading coverage across the entire 1-7/8" length for maximum grip strength and load distribution
• Regulatory compliance assurance meeting industry standards for quality and environmental safety

Professional Applications & Engineering Value

These 1/2"-13 UNC flat head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and structural integrity are paramount. The combination of 18-8 stainless steel material with passivated finish creates a protective barrier against chemical exposure and atmospheric corrosion, significantly extending service life in manufacturing equipment, marine hardware, and food processing machinery. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating play and preventing loosening under vibration - a common failure point in heavy machinery and automotive assemblies. The 82° countersink angle ensures flush mounting in precisely machined recesses, creating smooth surfaces that prevent snagging while maintaining structural continuity. With full threading along the entire shank, these screws distribute clamping forces evenly across the joint, making them ideal for critical connections in structural frameworks, industrial enclosures, and high-vibration environments where reliability cannot be compromised.

Specification Summary & Compliance

This flat head screw features precision UNC coarse threading with Class 3A fit for superior thread engagement and dimensional accuracy. Manufacturing complies with ASME B18.3 specifications and ASTM F879 standards governing material properties and performance requirements. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring restricted substance adherence for global industrial applications.