S-92620A113 1/4"-32 x 1 1/4" 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 capability with Grade 8 classification and 150,000 psi tensile strength for critical heavy-duty applications
- Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh industrial environments
- Precise thread engagement with UNEF extra fine threads and Class 2A fit ensuring vibration resistance and secure fastening
- Enhanced installation efficiency with external hex drive and standard 7/16" head width for common tool compatibility
- Optimized strength-to-weight ratio through Rockwell C33 hardness and partially threaded design
- Reliable performance compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
- Versatile application suitability with 1¼" length and extra fine thread spacing for precision assemblies
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and structural integrity are paramount. The UNEF extra fine thread configuration provides superior holding power in thin materials and precision components, while the zinc yellow-chromate plating offers enhanced protection against corrosion in outdoor or chemically aggressive environments. The partially threaded design concentrates strength where needed most, making it ideal for machinery, automotive assemblies, and structural frameworks requiring reliable 150,000 psi tensile strength. Engineered to ASME B18.2.1 standards, this fastener ensures consistent performance in critical load-bearing applications where failure is not an option.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with 1/4"-32 UNEF extra fine threading and 1¼" length. Complies with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and mechanical properties. The inch system measurement and external hex drive design provide standardized compatibility across industrial applications. Material composition and plating processes meet industry standards for mechanical fasteners in demanding environments.
