S-94705A330 5/8"-11 x 4 1/2" 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 applications, reducing the risk of fastener failure
• ASTM Grade B7 steel construction provides superior durability and resistance to deformation under heavy loads
• Rockwell C35 hardness rating offers excellent wear resistance for extended service life in demanding industrial environments
• Class 2A thread fit with UNC coarse threading enables quick assembly and secure fastening while maintaining precision tolerance standards
• External hex drive design allows for easy installation and removal with standard tools, improving maintenance efficiency
• Partially threaded configuration provides optimal grip length control for precise clamping force distribution
• ASTM A193 certification guarantees compliance with industry standards for high-temperature service applications

Professional Applications & Engineering Value

This Grade B7 steel hex head screw delivers critical performance advantages in demanding industrial settings where failure is not an option. The combination of 125,000 PSI tensile strength and Rockwell C35 hardness makes it ideal for pressure vessel assemblies, structural connections, and heavy machinery where vibration resistance and load-bearing capacity are paramount. The 5/8"-11 UNC coarse thread configuration ensures rapid installation while maintaining secure fastening in high-vibration environments. With partial threading and precise Class 2A thread fit, this fastener provides controlled clamping force distribution, preventing joint loosening in critical applications. Engineered to ASTM A193 specifications, this hex head screw offers reliable performance in elevated temperature service common in petrochemical, power generation, and industrial processing equipment.

Specification Summary & Compliance

This high-strength fastener features precise Class 2A thread fit tolerance with UNC coarse threading (5/8"-11) and partial threading configuration. Manufactured in compliance with ASTM A193 specification for high-temperature service, the screw meets ASTM Grade B7 material requirements with verified 125,000 PSI tensile strength and Rockwell C35 hardness. The inch system measurement ensures compatibility with standard industrial equipment and replacement parts. The external hex drive design with 1-1/16" head width provides optimal torque transmission for secure installations.