S-91263A598 3/8"-16 x 3 1/2" 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
- Enhanced corrosion resistance with zinc plating for extended service life in demanding environments
- Superior load-bearing capacity from 130,000 psi tensile strength, ideal for high-stress applications
- Exceptional thread engagement with Class 3A fit for reliable, vibration-resistant assemblies
- Optimized flush mounting with standard 82° countersink angle for seamless surface integration
- Robust material durability from Rockwell C39 hardness alloy steel, resisting wear and deformation
- Secure installation control via 7/32" hex drive, preventing cam-out during high-torque fastening
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global supply chain compatibility
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head screws deliver critical performance where flush surface mounting and high tensile strength are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for industrial equipment, machinery frames, and structural assemblies exposed to environmental stressors. With coarse UNC threading and partial threading design, they offer superior pull-out resistance in softer materials while maintaining precise clamp load distribution. The Class 3A thread fit ensures consistent engagement in tapped holes, reducing the risk of cross-threading in production environments. These heavy-duty screws are engineered to withstand dynamic loads and vibration in construction, manufacturing, and transportation applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to inch system dimensions with 3/8"-16 UNC coarse threads and Class 3A thread fit tolerance. These partially threaded flat head screws feature a standard 82° countersink angle and 7/32" hex drive configuration. The fasteners conform to ASTM F835 specifications for mechanical properties and are verified as RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety standards.
