S-91257A691 7/16"-14 x 6" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 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 150,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
- Optimized torque transmission with external hex drive design for secure installation and easy maintenance
- Enhanced durability featuring Rockwell C33 hardness to withstand repeated use without deformation
- Precision threading with Class 2A fit and UNC coarse thread pattern for quick assembly and vibration resistance
- Partial threading design that provides both gripping strength and clearance where needed
- Industry compliance meeting ASME B18.2.1 and SAE J429 standards for guaranteed quality and performance
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver critical performance where structural integrity matters most. The steel construction with zinc yellow-chromate plating creates a robust barrier against corrosion in demanding environments like construction, heavy machinery, and industrial equipment. The 7/16"-14 UNC coarse threading ensures rapid installation while maintaining secure fastening, reducing assembly time without compromising safety. With partial threading and external hex drive, these fasteners provide optimal clamping force distribution while allowing for straightforward maintenance access. Engineered for heavy-duty applications requiring maximum tensile strength and durability, these screws solve critical fastening challenges in structural steel connections, machinery assembly, and equipment manufacturing where failure is not an option.
Specification Summary & Compliance
This 6" hex head screw features precise Class 2A thread fit with 7/16"-14 UNC coarse threading and right-hand thread direction. Manufactured to ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring strict material restrictions.
