S-92620A562 1/4"-28 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
- Exceptional load-bearing capacity 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 Class 2A UNF fine threads ensuring secure, vibration-resistant connections
- Maximum torque transmission through the external hex drive design for easy installation and removal
- Enhanced durability from Rockwell C33 hardness, maintaining structural integrity under repeated use
- Full threading coverage along the 1/2" length for consistent clamping force distribution
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance advantages for demanding industrial applications where fastener failure is not an option. The combination of high-strength steel construction and UNF fine threading provides superior resistance to vibration loosening in heavy machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, significantly extending maintenance intervals. With their external hex drive and fully threaded design, these fasteners enable efficient installation and maximum thread engagement, solving common challenges of joint integrity in critical load-bearing applications while maintaining compliance with major industrial standards.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and 1/4"-28 UNF fine threads ensuring consistent performance across applications. These screws conform to ASME B18.2.1 and SAE J429 Grade 8 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no substances of very high concern above threshold limits as of the latest compliance verification.
