S-91268A124 1 1/8"-7 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 capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior wear resistance due to Rockwell C33 hardness, ensuring extended service life in demanding environments
- Optimized thread engagement with partial threading design that provides superior holding power while reducing installation time
- Precise Class 2A thread fit ensures smooth assembly and consistent clamping force in industrial applications
- Heavy-duty hex head design (1 11/16" width) allows for high-torque installation with standard tools
- Coarse UNC threading (1-1/8"-7) provides excellent resistance to vibration loosening in machinery and structural applications
- Full regulatory compliance with RoHS 3 and REACH environmental standards for safe global usage
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction machinery, structural steel connections, and heavy equipment assembly. The steel construction combined with Rockwell C33 hardness provides outstanding resistance to shear forces and impact loading, while the 1-1/8"-7 UNC coarse thread maintains secure fastening in high-vibration environments. The partial threading design concentrates strength where needed most, preventing thread stripping and ensuring reliable clamping force in critical joints. These ASME B18.2.1 compliant fasteners are specifically designed to withstand the rigorous demands of industrial settings where failure is not an option.
Specification Summary & Compliance
This 6-inch hex head screw features precise Class 2A thread fit with 1-1/8"-7 UNC coarse threading and 2-1/2" minimum thread length. Manufactured to ASME B18.2.1 specifications and SAE J429 Grade 8 standards, ensuring dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe industrial use worldwide.
