S-94705A838 1 1/4"-8 x 5" 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 demanding environments.
• Partially threaded design with 2 1/4" grip length allows for precise clamping force distribution, ideal for materials requiring controlled tension.
• Class 2A thread fit offers consistent installation with standard nuts, minimizing cross-threading and ensuring secure assemblies.
• External hex drive with 2" head width facilitates easy installation and removal using common tools, speeding up maintenance and assembly processes.
• UN fine thread configuration (1 1/4"-8) delivers enhanced vibration resistance and superior holding power compared to coarse threads.
• ASTM A193 Grade B7 compliance guarantees material integrity and performance consistency for high-temperature and high-pressure applications.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade B7 steel hex head screw addresses critical challenges in sectors like petrochemical, power generation, and construction. Its partially threaded design and UN fine thread optimize load distribution, preventing stress concentration in flanged connections or structural assemblies. The external hex drive ensures compatibility with standard wrenches, reducing installation time and tooling costs. With a Rockwell C35 hardness and 125,000 PSI tensile strength, it withstands corrosive environments and mechanical stresses, minimizing downtime and maintenance needs. Compliant with ASTM A193, it meets rigorous standards for high-strength bolts in pressure systems, offering reliable performance where safety and durability are paramount.

Specification Summary & Compliance

This screw features a Class 2A thread fit per UN standards, ensuring precise engagement with mating components. Dimensions include a 5" length, 2 3/4" thread length, and 2" head width for consistent installation. Manufactured to ASTM A193 Grade B7 specifications, it adheres to material and performance requirements for high-temperature service. The product meets industry standards for dimensional accuracy and is suitable for applications requiring heavy-duty fasteners with verified mechanical properties.