S-91247A680 7/16"-14 x 2 3/4" 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 – Grade 5 steel construction and 120,000 psi tensile strength ensure reliable performance in high-stress applications.
- Superior Corrosion Resistance – Zinc plating provides durable protection against rust and environmental degradation.
- Optimized Thread Engagement – UNC coarse threading and Class 2A fit offer quick assembly and secure fastening.
- Enhanced Durability – Rockwell C25 hardness guarantees long-term wear resistance and structural integrity.
- Efficient Installation – External hex drive and 5/8" head width allow for easy torque application with standard tools.
- Versatile Partial Threading – 1 1/8" minimum thread length provides flexibility for varied clamping requirements.
- Regulatory Compliance – Meets ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for safe, industry-approved use.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address critical challenges in industrial and construction settings, where vibration resistance and structural stability are paramount. The UNC coarse thread design minimizes cross-threading risks and accelerates installation in heavy machinery, structural steel frameworks, and automotive assemblies. With zinc plating enhancing corrosion protection, the fastener maintains integrity in humid or outdoor environments. Its partial threading allows precise clamping force distribution, reducing stress concentration. Ideal for heavy-duty fastening in equipment manufacturing and infrastructure projects, this screw combines high tensile strength with compliance to global standards, ensuring reliability and safety in demanding applications.
Specification Summary & Compliance
This fastener adheres to Class 2A thread fit tolerances for consistent engagement and is manufactured per ASME B18.2.1 and SAE J429 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. Dimensions include a 7/16"-14 UNC thread size, 2 3/4" length, and coarse thread spacing, all measured in the inch system for precision.
