S-91257A969 1"-8 x 6" 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 capability with 150,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Optimized thread engagement with Class 2A UNC coarse threads ensuring secure fastening and vibration resistance
- Enhanced durability from Rockwell C33 hardness providing excellent wear resistance and long service life
- Easy installation and removal with external hex drive design allowing for high torque application
- Versatile partial threading offering both gripping strength and clearance where needed
- Full regulatory compliance meeting ASME, SAE, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance in heavy-duty industrial applications where failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness ensures these steel fasteners maintain integrity under extreme loads and vibration. The zinc yellow-chromate plating provides essential corrosion protection for outdoor equipment, machinery, and structural assemblies exposed to harsh conditions. With 1"-8 UNC coarse threads and Class 2A thread fit, these partially threaded hex screws offer optimal clamping force while resisting loosening in high-vibration environments. The external hex drive design accommodates standard tools for efficient installation in confined spaces.
Specification Summary & Compliance
This 6" length hex head screw features 1"-8 UNC coarse threads with Class 2A thread fit precision manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications. The fastener is partially threaded with minimum thread length of 2-1/4" and meets comprehensive compliance standards including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for safe industrial use worldwide.
