S-92865A155 1/4"-20 x 4 3/4" 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, ideal for high-stress applications
- Superior corrosion resistance through zinc plating, extending service life in demanding environments
- Reliable thread engagement with UNC coarse threading that resists vibration loosening
- Precise torque application enabled by external hex drive and 7/16" head width
- Optimized weight distribution through partial threading design for balanced fastening performance
- Consistent mechanical properties with Rockwell C25 hardness ensuring dimensional stability
- Quick installation compatibility with standard hex tools commonly available in industrial settings
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical performance in heavy-duty industrial applications where fastener failure is not an option. The zinc plated steel construction provides essential corrosion protection for machinery, equipment frames, and structural assemblies exposed to harsh operating conditions. The 1/4"-20 UNC coarse thread configuration ensures rapid installation and superior resistance to vibration-induced loosening, while the partially threaded design concentrates strength where needed most. With external hex drive compatibility, maintenance teams can achieve proper torque values using standard tools, reducing installation time and ensuring consistent clamping force across multiple connection points in manufacturing, construction, and machinery applications.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerances per UNC standards with precise 4 3/4" length and 3/4" minimum thread length. Manufactured to meet ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global markets.
