S-91257A692 7/16"-14 x 6 1/2" 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
- Maximum load-bearing capability with 150,000 psi tensile strength for critical structural applications
- Superior corrosion protection through zinc yellow-chromate plating in harsh industrial environments
- Enhanced durability with Rockwell C33 hardness to withstand high-stress conditions
- Reliable thread engagement with Class 2A fit and UNC coarse threads for easier assembly
- Optimized torque transmission through external hex drive design for secure fastening
- Versatile partial threading allowing both clamping and alignment functions
- Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance in construction, machinery assembly, and structural frameworks. The 7/16"-14 UNC coarse thread design ensures rapid installation and reliable holding power in steel-to-steel connections, while the zinc yellow-chromate plating provides critical corrosion resistance in demanding environments. The partially threaded configuration allows for both precise clamping force and alignment capabilities, making these external hex drive fasteners ideal for applications requiring both structural integrity and vibration resistance. With their 6 1/2" length and high-strength steel construction, they solve critical challenges in heavy equipment manufacturing and infrastructure projects where failure is not an option.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (7/16"-14) and partial threading extending 1-3/8" minimum. Complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. The zinc yellow-chromate plating meets industry standards for corrosion protection while maintaining Rockwell C33 hardness and 150,000 psi tensile strength requirements for heavy-duty applications.
