S-91263A781 7/16"-14 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in harsh industrial environments
• Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and prevents fastener failure
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in critical applications
• Full threading design offers maximum grip length and consistent holding power across the entire fastener
• Standard 82° countersink angle allows for flush mounting that eliminates protrusions and creates smooth surface finishes
• Hex drive compatibility with 1/4" tools enables quick installation and removal while preventing cam-out during high-torque applications
• Comprehensive compliance with ASTM F835, RoHS 3, and REACH standards ensures material quality and environmental responsibility

Professional Applications & Engineering Value

These zinc-plated alloy steel flat head screws deliver exceptional engineering value across demanding industrial applications. The combination of Rockwell C39 hardness and 130,000 psi tensile strength makes them ideal for heavy machinery, structural assemblies, and equipment requiring reliable fastening under constant stress. The 7/16"-14 UNC coarse thread configuration provides superior holding power in softer materials and faster installation times. The standard flat head profile with 82° countersink ensures seamless integration into precision-machined components, eliminating surface irregularities while maintaining structural integrity. These fully threaded hex drive screws solve common industrial challenges including vibration-induced loosening, corrosion degradation, and installation efficiency, making them essential for manufacturing, construction, and maintenance operations where failure is not an option.

Specification Summary & Compliance

This 3/4" flat head screw features precision Class 3A thread fit with UNC coarse threading (7/16"-14) and standard dimensional tolerances. Manufacturing complies with ASTM F835 specifications for mechanical properties and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility and workplace safety compliance.