S-92210A723 1/2"-13 x 2 3/4" 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, heavy-duty fastening
• Precision thread engagement with Class 3A thread fit ensuring secure, vibration-resistant connections in critical assemblies
• Optimized drive efficiency featuring 5/16" hex drive for high-torque installation without cam-out issues
• Flush mounting capability with standard 82° countersink angle allowing seamless surface integration in manufactured products
• Full-threaded design providing maximum grip length and load distribution across the entire fastener length
• Regulatory compliance assurance meeting ASME B18.3, ASTM F879, RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 1/2"-13 UNC flat head screws deliver critical performance advantages where corrosion resistance and structural integrity are paramount. The combination of 18-8 stainless steel material and passivated surface treatment creates a protective barrier against chemical exposure and atmospheric corrosion, significantly extending service life in marine, chemical processing, and outdoor applications. The Class 3A thread fit provides tighter tolerances than standard fasteners, eliminating play in assembled components and preventing loosening under vibration - a common failure point in machinery and equipment. The flat head configuration with 82° countersink enables flush mounting in precision assemblies where protruding fasteners would interfere with function or safety. With full threading along the 2 3/4" length, these screws maximize engagement in thick materials and distribute clamp load more effectively than partially threaded alternatives.

Specification Summary & Compliance

This flat head screw maintains precision Class 3A thread fit according to UNC coarse thread standards with exact dimensional control. Manufacturing conforms to ASME B18.3 specifications and ASTM F879 material standards, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for global supply chains and environmentally conscious manufacturing operations.