S-91247A777 9/16"-12 x 5" 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
- Superior load-bearing capacity with 120,000 psi tensile strength for reliable performance in high-stress assemblies
- Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
- Exceptional mechanical durability backed by Rockwell C25 hardness and Grade 5 certification for repeated use
- Efficient installation and removal via external hex drive design compatible with standard wrench tools
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for global supply chain integration
- Versatile partial threading allowing precise clamp load control across varied material thicknesses
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical engineering solutions for heavy machinery, structural steel connections, and industrial equipment assemblies. The zinc plated steel construction combats environmental degradation in manufacturing facilities and outdoor installations, while the 9/16"-12 UNC coarse thread profile maintains holding power in vibration-prone applications. With partial threading enabling targeted grip length adjustment, engineers can optimize joint integrity across layered materials without compromising the 120,000 psi tensile strength. The external hex drive ensures high-torque installation compatibility with standard industrial tools, reducing assembly time in high-volume production environments.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerances ensuring dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Inch-system measurements include 5" length, 13/16" head width, and 1-3/8" minimum thread length. Right-hand thread direction conforms to North American industrial standards.
