S-92865A599 5/16"-18 x 4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex 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 load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating that protects against environmental degradation
- Optimized thread engagement with UNC coarse threads providing faster installation and stronger holding power
- Precise mechanical fit through Class 2A thread tolerance ensuring consistent assembly quality
- Enhanced durability from Grade 5 steel construction with Rockwell C25 hardness for long service life
- Efficient installation with external hex drive design allowing high torque application
- Full thread coverage along the 4" length for maximum grip and distribution of clamping force
Professional Applications & Engineering Value
These Grade 5 steel hex head screws deliver critical performance where structural integrity matters most. The zinc plated finish provides essential corrosion protection for outdoor equipment, construction frameworks, and industrial machinery exposed to harsh environments. The 5/16"-18 UNC coarse thread configuration ensures rapid assembly while maintaining superior pull-out resistance, making them ideal for heavy-duty applications requiring repeated disassembly and reassembly. With fully threaded design along the entire 4" length, these fasteners distribute clamping force evenly across connected materials, preventing stress concentration points that could lead to material fatigue or failure in structural steel connections, mechanical assemblies, and equipment mounting systems.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerance for precise mechanical assembly, these hex head screws conform to ASME B18.2.1 and SAE J429 Grade 5 specifications. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety. The UNC coarse thread pattern follows standardized dimensions with 18 threads per inch, ensuring compatibility with industry-standard nuts and threaded components.
