S-92620A248 9/16"-18 x 3 3/4" 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
- Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that extends service life in demanding environments
- Precise torque transmission enabled by external hex drive design and 13/16" head width for secure installation
- Optimized thread engagement with UNF fine threading and Class 2A fit ensuring vibration resistance and consistent clamping force
- Enhanced durability from Rockwell C33 hardness that maintains structural integrity under repeated stress
- Versatile partial threading allowing for both secure fastening and adjustable positioning in assembly applications
- Regulatory compliance assurance meeting industrial standards including RoHS 3 and REACH for global supply chain compatibility
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plated steel construction provides superior protection against environmental degradation, while the UNF fine threading with Class 2A fit ensures precise alignment and vibration resistance in machinery, structural frameworks, and heavy equipment assemblies. The partially threaded design offers flexibility for applications requiring both clamping and adjustment capabilities, making these industrial fasteners ideal for automotive, construction, and manufacturing sectors where reliability under extreme conditions is non-negotiable.
Specification Summary & Compliance
Manufactured to exact inch system dimensions with 9/16"-18 UNF fine threads maintaining Class 2A thread fit tolerance. 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, ensuring safe usage across global industrial applications.
