S-91263A793 7/16"-20 x 1" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc plating that protects against harsh industrial environments and extends service life
• Superior tensile strength of 130,000 psi ensures reliable performance in high-stress applications and prevents fastener failure
• Precise Class 3A thread fit provides excellent engagement and vibration resistance for secure, long-lasting assemblies
• 82° countersink angle allows for flush mounting in standard countersunk holes, creating smooth, professional-looking surfaces
• Rockwell C39 hardness maintains thread integrity and prevents stripping during installation and throughout the product lifecycle
• Full threading along the 1" length offers maximum grip and adjustment flexibility in various material thicknesses
• 1/4" hex drive compatibility enables quick installation with standard industrial tools, reducing assembly time and labor costs

Professional Applications & Engineering Value

These zinc-plated alloy steel flat head screws deliver critical performance advantages in demanding industrial environments. The combination of Class 3A UNF fine threading and 130,000 psi tensile strength addresses common failure points in vibration-prone applications, maintaining clamp load integrity where standard fasteners might loosen. The 82° countersink profile ensures proper seating in precision-machined components, while the zinc plating provides essential corrosion protection for outdoor equipment, machinery, and automotive assemblies. Engineered to meet ASTM F835 specifications, these screws offer reliable fastening solutions for structural applications where safety and durability are paramount, reducing maintenance frequency and total cost of ownership.

Specification Summary & Compliance

This 7/16"-20 UNF flat head screw features precise Class 3A thread fit with fine thread spacing, manufactured to exacting dimensional standards. The product fully complies with ASTM F835 specifications for mechanical properties and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restricted substance compliance for global markets. The screw maintains dimensional accuracy with 1" length, 0.844" head diameter, and 0.234" head height for consistent performance across production runs.