S-91283A156 1 1/8"-7 x 5 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 demanding applications
- Superior corrosion resistance and durability through Grade 5 steel construction with Rockwell C19 hardness
- Easy installation and removal with external hex drive design and 1 11/16" head width for secure tool engagement
- Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring secure fastening
- Versatile partial threading design allowing for both clamping and alignment functions in assembly operations
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed interoperability
- Environmental regulation adherence with RoHS 3 and REACH compliance for global market acceptance
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assembly. The 1 1/8"-7 UNC coarse thread configuration provides superior resistance to vibration loosening while enabling rapid installation in thick materials. With partial threading and 5 1/2" length, it offers precise unthreaded shank sections for shear load management while maintaining sufficient thread engagement. The external hex drive accommodates high torque applications, making it ideal for construction, manufacturing, and maintenance operations where 100,000 psi tensile strength ensures joint integrity under extreme loads. This industrial fastener combines material excellence with precision engineering to solve vibration, corrosion, and load distribution challenges in critical assemblies.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNC coarse threading (1 1/8"-7) and partial threading configuration. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and performance requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features Rockwell C19 hardness and maintains 100,000 psi tensile strength throughout the fastener's service life.
