S-94705A746 5/8"-11 x 3 1/4" ASTM A193 Steel Heavy Hex Head Screws for High-Pressure Applications

Key Features & Benefits at a Glance

• Exceptional tensile strength of 125,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• ASTM Grade B7 steel construction with Rockwell C35 hardness provides superior durability and resistance to wear, extending service life in harsh environments.
• Class 2A thread fit with UNC coarse threads offers easy assembly and disassembly while maintaining secure fastening, minimizing installation time and errors.
• Partially threaded design allows for precise grip length control, enhancing stability in assemblies where vibration or dynamic loads are present.
• External hex drive and hex head enable efficient torque application with standard tools, streamlining maintenance and reducing labor costs.
• ASTM A193 compliance guarantees adherence to rigorous industry standards, ensuring consistency and safety in critical engineering projects.
• Right-hand coarse threading in inch measurements provides compatibility with common North American equipment, simplifying inventory and replacement processes.

Professional Applications & Engineering Value

This Grade B7 steel hex head screw is engineered to address demanding industrial challenges, such as high-pressure and high-temperature environments common in oil and gas, construction, and heavy machinery sectors. The partially threaded configuration with a 1 3/4" grip length ensures optimal clamping force distribution, preventing loosening under vibration—a frequent pain point in dynamic assemblies. Made from ASTM A193 compliant material, it combines 125,000 PSI tensile strength and Rockwell C35 hardness to resist deformation and corrosion, reducing maintenance downtime. The 5/8"-11 UNC coarse thread and Class 2A fit facilitate quick installation with standard wrenches, enhancing efficiency in industrial fastening applications while meeting strict regulatory requirements for safety and performance.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 2A thread fit and UNC coarse threading with a thread size of 5/8"-11, ensuring consistent compatibility and performance. It meets ASTM A193 specifications for material and manufacturing, with additional compliance typically covering RoHS and REACH environmental directives, supporting use in regulated industries. The inch-based measurements, such as a 3 1/4" length and 1 1/2" thread length, provide accuracy for engineering calculations and assembly planning.