S-91286A397 5/8"-11 x 1 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
- Maximum load-bearing capability with Grade 8 classification and 150,000 psi tensile strength for critical structural applications.
- Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial environments.
- Optimized torque transmission through external hex drive design and 15/16" head width for secure installation.
- Reliable thread engagement with UNC coarse threading and Class 2A fit ensuring consistent clamping force.
- Full-threaded design delivering uniform stress distribution along the entire 1-1/2" length.
- Enhanced durability from Rockwell C33 hardness maintaining fastener integrity under repeated stress.
- Regulatory compliance meeting ASME B18.2.1, SAE J429 standards with RoHS 3 and REACH environmental directives.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws solve critical fastening challenges where vibration resistance and structural integrity are paramount. The zinc-flake coated steel construction provides exceptional protection against corrosion in manufacturing facilities, construction sites, and machinery assembly. The 5/8"-11 UNC coarse thread configuration ensures rapid installation and superior holding power in steel frameworks, equipment bases, and structural connections. With fully threaded design and external hex drive, these fasteners distribute stress evenly while allowing high-torque installation, making them ideal for high-vibration environments where joint integrity cannot be compromised.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with UNC coarse threading (5/8"-11) and right-hand direction. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 8 specifications. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring safe use across regulated industries.
