S-94705A847 1 1/4"-8 x 7" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications
Steel Heavy Hex Head Screws for High-Pressure Applications
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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 125,000 psi tensile strength for reliable performance in high-stress applications
- Superior material durability through ASTM Grade B7 steel construction ensuring resistance to deformation under extreme conditions
- Precision thread engagement with Class 2A thread fit providing consistent clamping force and vibration resistance
- Optimized torque transmission via external hex drive and 2" head width for secure installation with standard tools
- Enhanced fatigue resistance through Rockwell C35 hardness maintaining structural integrity through repeated loading cycles
- Versatile partial threading design combining 3" threaded section with 4" grip length for flexible joint configurations
- Reliable fine thread performance with UN 8-Threads-Per-Inch spacing ensuring superior holding power in critical assemblies
Professional Applications & Engineering Value
This Grade B7 steel hex head screw delivers critical engineering solutions for industrial applications requiring high-temperature resistance and sustained mechanical performance. The ASTM A193 certified construction ensures consistent material properties in demanding environments such as pressure vessel assemblies, structural steel connections, and heavy machinery frameworks. The partially threaded design provides optimal stress distribution across the 4" grip length while the UN fine threads maintain superior clamp load retention under vibration. With external hex drive compatibility and precise Class 2A thread fit, these fasteners enable efficient installation and long-term reliability in critical infrastructure projects where failure is not an option.
Specification Summary & Compliance
Manufactured to exacting inch system dimensions with 1 1/4"-8 UN fine threads maintaining Class 2A thread fit tolerance for precision assembly. Full compliance with ASTM A193 specification for high-temperature service applications, featuring Grade B7 material certification and verified mechanical properties including 125,000 psi tensile strength and Rockwell C35 hardness. The fastener meets industry standards for heavy-duty industrial applications with right-hand threading and partial threading configuration spanning 3" of the 7" total length.
