S-91247A892 7/8"-9 x 5" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating that protects against rust and extends service life
- Optimized torque transmission with external hex drive design for secure installation and easy removal
- Enhanced thread engagement with UNC coarse threading that resists vibration loosening in industrial environments
- Precision manufacturing with Class 2A thread fit ensuring consistent performance and easy assembly
- Grade 5 certification providing verified mechanical properties and quality assurance
- Environmental compliance meeting RoHS 3 and REACH regulations for safe industrial use
Professional Applications & Engineering Value
This Grade 5 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 7/8"-9 UNC coarse thread configuration prevents self-loosening under dynamic loads, while the zinc plated steel construction provides essential corrosion protection in harsh environments. The external hex drive enables high-torque installation, making it ideal for applications requiring secure fastening in construction, manufacturing, and automotive sectors. With partial threading optimizing grip length, this fastener ensures maximum clamping force where it's needed most.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 Grade 5 standards, this hex head screw features Class 2A thread fit for precise dimensional accuracy and reliable assembly. The fastener maintains Rockwell C25 hardness and meets comprehensive regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring environmental responsibility and workplace safety. All measurements conform to inch system specifications with right-hand threading and coarse thread spacing for optimal performance in industrial applications.
