S-91263A599 1/2"-13 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with zinc plating that protects against rust in demanding industrial environments
- Superior load-bearing capability from 130,000 psi tensile strength for reliable performance in high-stress applications
- Precision thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- Optimized flush mounting with standard 82° countersink angle for seamless surface integration
- Enhanced installation efficiency through hex drive design allowing high-torque application without cam-out
- Long-term durability from Rockwell C39 hardness maintaining thread integrity through repeated use
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These zinc-plated alloy steel flat head screws deliver critical performance advantages for industrial assembly applications where surface flushness and high strength are paramount. The Class 3A thread fit provides superior engagement in tapped holes, reducing the risk of cross-threading while maintaining consistent clamping force in vibrating environments. The fully threaded UNC coarse pattern enables rapid installation across various material thicknesses, while the 82° countersink angle ensures proper seating in standard chamfered holes. Engineered for machinery, structural frameworks, and heavy equipment assembly, these hex drive fasteners withstand extreme mechanical stresses while their corrosion-resistant zinc plating extends service life in challenging operating conditions.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread spacing (1/2"-13). Complies with ASTM F835 specifications for mechanical properties and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features 5/16" hex drive compatibility and standard 82° flat head profile for consistent industry-standard installation.
