S-91247A516 7/8"-14 x 7" 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 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
- Precise thread engagement with Class 2A UNF fine threads ensuring secure, vibration-resistant connections
- Optimized torque transmission through external hex drive design for efficient installation and removal
- Controlled thread engagement with partial threading for strategic load distribution and reduced weight
- Certified material quality with Grade 5 classification and Rockwell C25 hardness for consistent mechanical properties
- Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for global acceptance
Professional Applications & Engineering Value
These 7/8"-14 UNF hex head screws deliver critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The Grade 5 steel construction combined with Rockwell C25 hardness provides optimal strength-to-weight ratio, while the zinc plating offers essential protection against environmental degradation. The UNF fine threading ensures superior clamping force distribution, making these partially threaded fasteners ideal for machinery assembly, structural steel connections, and equipment manufacturing where precise thread engagement and high tensile strength are required. The external hex drive facilitates quick installation with standard tools, reducing assembly time in production environments.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. These hex head screws comply with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. The products are fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety standards for industrial use.
