S-92620A119 5/16"-32 x 2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 capability with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
- Precise thread engagement with UNEF extra fine threading and Class 2A fit for secure fastening in thin materials
- Optimized drive performance through external hex head design allowing high torque application and easy installation
- Enhanced durability from Rockwell C33 hardness and Grade 8 classification for long-term reliability
- Versatile partial threading enabling both clamping and alignment functions in assembly operations
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions where vibration resistance and precise clamping are paramount. The 5/16"-32 UNEF extra fine thread spacing provides superior holding power in thin-section materials and delicate components, preventing stripping while maintaining joint integrity. The zinc yellow-chromate plating creates a robust barrier against corrosion in industrial environments, significantly reducing maintenance frequency. With partial threading and external hex drive, these fasteners offer optimal combination of grip range and installation efficiency. Ideal for heavy machinery, automotive assemblies, and precision equipment where 150,000 psi tensile strength ensures structural reliability under dynamic loads.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNEF thread form ensuring precise engagement. Complies with ASME B18.2.1 dimensional standards and SAE J429 material specifications. Features right-hand thread direction with 0.3125" thread diameter and 7/8" minimum thread length. The Rockwell C33 hardness and Grade 8 classification guarantee consistent mechanical properties. Meets industry standards for dimensional accuracy and material performance in industrial fastener applications.
