S-94705A738 1/2"-13 x 6 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 under extreme loads, reducing the risk of fastener failure in critical applications.
• High hardness rating (Rockwell C35) provides superior resistance to wear and deformation, extending service life in abrasive environments.
• Partially threaded design with a 4-3/4" grip length offers optimal clamping force distribution, minimizing stress concentration and vibration loosening.
• Class 2A thread fit with coarse UNC threading enables quick assembly and disassembly while maintaining secure connections in high-vibration settings.
• ASTM A193 Grade B7 compliance guarantees material integrity and manufacturing consistency for use in high-pressure and high-temperature systems.
• External hex drive and standard 7/8" head width allow for easy installation with common tools, speeding up maintenance and reducing labor costs.
• Robust steel construction ensures corrosion resistance and durability, making it ideal for long-term industrial and structural applications.

Professional Applications & Engineering Value

This Grade B7 steel hex head screw is engineered to address common industrial challenges such as joint integrity under dynamic loads and thermal cycling. Its partially threaded configuration and coarse UNC thread provide enhanced grip and vibration resistance, crucial for machinery, pressure vessels, and structural frameworks. The ASTM A193 certification ensures compliance with rigorous standards for high-strength fasteners used in petrochemical, power generation, and heavy equipment sectors. By combining 125,000 psi tensile strength with a Rockwell C35 hardness, it mitigates risks of stripping, fatigue, and premature wear, delivering reliable performance in demanding environments where safety and durability are paramount.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances and UNC coarse thread standards, ensuring precise engagement and interchangeability. It meets ASTM A193 Grade B7 specifications for material composition and mechanical properties, with full traceability for quality assurance. The product is manufactured in accordance with industry-accepted dimensional and performance criteria, supporting compliance in applications requiring high-strength, heat-treated steel components. RoHS and REACH conformance can be verified upon request for environmental regulatory needs.