S-92620A605 5/16"-24 x 1/2" 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
- Maximum load-bearing capacity with Grade 8 classification and 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating that withstands harsh industrial environments
- Precise thread engagement with UNF fine threads and Class 2A fit ensuring vibration resistance and secure fastening
- High torque capability from the external hex drive design that prevents tool slippage during installation
- Enhanced durability with Rockwell C33 hardness maintaining fastener integrity under repeated stress
- Full-threaded design providing consistent gripping strength along the entire 1/2" length
- Regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value in heavy machinery, automotive assemblies, and structural frameworks where failure is not an option. The UNF fine thread configuration combined with Class 2A thread fit ensures superior vibration resistance, preventing loosening in dynamic applications. The zinc yellow-chromate plating provides a robust barrier against corrosion, extending service life in challenging environments. With 150,000 psi tensile strength and Rockwell C33 hardness, these fully threaded fasteners maintain clamping force under extreme loads, making them ideal for critical joints in construction equipment, manufacturing fixtures, and transportation systems where reliability is paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread tolerances with 5/16"-24 UNF fine threads and right-hand threading. Complies with ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features 1/2" length with external hex drive and fully threaded design for consistent performance across industrial applications.
