S-92620A249 9/16"-18 x 6 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 through zinc yellow-chromate plating that protects against harsh industrial environments
- Precise torque transmission enabled by external hex drive design and Rockwell C33 hardness for secure fastening
- Optimized thread engagement with UNF fine threading and Class 2A fit ensuring vibration resistance and consistent clamping force
- Enhanced durability from Grade 8 steel construction meeting rigorous industrial standards for long service life
- Versatile partial threading allowing for both secure fastening and adjustable positioning in assembly applications
- Regulatory compliance assurance with RoHS 3 and REACH standards for safe use across global markets
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where vibration resistance and high tensile strength are paramount. The zinc yellow-chromate plated finish provides exceptional corrosion protection in demanding environments, while the UNF fine threading with Class 2A fit ensures precise thread engagement that maintains clamping force under dynamic loads. The partially threaded design offers flexibility in applications requiring both secure fastening and adjustable components. Manufactured from high-strength steel with Rockwell C33 hardness, these hex head screws withstand extreme conditions while maintaining structural integrity in construction, automotive, and manufacturing applications.
Specification Summary & Compliance
This fastener features 9/16"-18 UNF fine threading with Class 2A dimensional accuracy and partial threading with minimum 1 5/8" thread length. Manufactured to ASME B18.2.1 and SAE J429 specifications for Grade 8 fasteners, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for international industrial applications requiring certified components.
