S-91247A811 5/8"-11 x 3 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior load-bearing capacity with Grade 5 classification and 120,000 psi tensile strength for demanding industrial applications
- Enhanced corrosion resistance through zinc plating, extending service life in harsh environments
- Optimized thread engagement with UNC coarse threading and Class 2A fit ensuring reliable fastening in various materials
- High torque transmission capability via external hex drive design for secure installation with standard tools
- Controlled partial threading providing precise grip length while maintaining unthreaded shank strength
- Consistent mechanical properties with Rockwell C25 hardness for dimensional stability under stress
- Regulatory compliance assurance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where vibration resistance and high tensile strength are paramount. The 5/8"-11 UNC coarse thread configuration prevents cross-threading during assembly while providing superior pull-out resistance in steel frameworks and construction applications. Zinc plating creates a sacrificial barrier against oxidation, significantly extending service life in moisture-prone environments. The partially threaded design concentrates stress distribution away from the head, reducing the risk of shear failure in dynamic loading conditions. These industrial hex bolts are engineered to maintain clamping force integrity in high-vibration settings common in manufacturing plants, transportation equipment, and infrastructure projects.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 and SAE J429 specifications with Class 2A thread fit tolerance ensuring precise dimensional accuracy. The inch-system fastener features 5/8"-11 UNC coarse threads with minimum 1½" thread length and 3¾" overall length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming restriction of hazardous substances in industrial applications.
