S-91283A282 1 1/4"-7 x 10" 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 through compliant steel construction meeting RoHS 3 and REACH environmental standards
- Easy installation and removal with external hex drive and 1 7/8" head width providing excellent tool engagement
- Optimized thread engagement through UNC coarse threading with Class 2A fit ensuring secure fastening in various materials
- Enhanced durability with Rockwell C19 hardness maintaining structural integrity under repeated stress
- Versatile partial threading allowing both clamping and alignment functions in structural assemblies
- Industry-standard compliance with ASME B18.2.1 and SAE J429 specifications guaranteeing interchangeability and reliability
Professional Applications & Engineering Value
This Grade 5 steel hex head screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The 1 1/4"-7 UNC coarse threading with Class 2A thread fit provides superior grip in steel frameworks, machinery bases, and construction assemblies, preventing loosening under dynamic loads. The partially threaded design allows precise clamping force distribution while the external hex drive ensures quick installation in confined spaces. Manufactured to ASME B18.2.1 specifications, this fastener maintains consistent performance in structural steel connections, industrial equipment maintenance, and heavy machinery fabrication where 100,000 psi tensile strength is essential for safety-critical applications.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1 1/4"-7 UNC coarse threading and 10" length with 3" minimum thread length. Manufactured in compliance with ASME B18.2.1 and SAE J429 Grade 5 standards, ensuring dimensional accuracy and mechanical properties. The fastener is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use.
