S-91283A151 1 1/8"-7 x 6 1/2" 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 100,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance and durability through high-grade steel construction and Rockwell C19 hardness
- Optimized installation efficiency with external hex drive and coarse UNC threading for faster assembly
- Precise thread engagement with Class 2A fit ensuring consistent clamping force and vibration resistance
- Versatile partial threading design providing both secure fastening and adjustment flexibility
- Industry-standard compliance meeting ASME B18.2.1 specifications for guaranteed interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for sustainable manufacturing
Professional Applications & Engineering Value
These Grade 5 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where failure is not an option. The combination of high-strength steel construction and coarse UNC threading provides exceptional resistance to vibration loosening and structural fatigue. The partially threaded design allows for precise clamping force distribution while the external hex drive enables high-torque installation with standard tools. These industrial hex bolts are engineered to maintain integrity in construction equipment, machinery frames, and structural assemblies where 100,000 psi tensile strength and Rockwell C19 hardness prevent deformation under extreme loads. The 1 1/8"-7 UNC thread specification ensures compatibility with standard components across various industrial sectors.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1 1/8"-7 UNC coarse threading and 2 3/4" minimum thread length on a 6 1/2" overall length. Manufactured to ASME B18.2.1 specifications (SAE J429) with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The Grade 5 strength classification ensures consistent mechanical properties and reliable performance across all production batches.
