S-94705A745 5/8"-11 x 2 3/4" 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 mechanical loads, reducing the risk of fastener failure in critical applications.
• Superior material durability from ASTM Grade B7 steel with Rockwell C35 hardness provides excellent resistance to wear, deformation, and stress corrosion cracking.
• Precision thread fit with Class 2A tolerance ensures smooth assembly and secure fastening, minimizing cross-threading and improving installation efficiency.
• Optimized load distribution through the partially threaded design increases grip strength and reduces stress concentration at the thread root.
• Heavy-duty construction compliant with ASTM A193 standards guarantees consistent quality and performance in high-temperature and high-pressure environments.
• Easy installation and removal with external hex drive and 1 1/16" head width allows for standard wrench access, speeding up maintenance and assembly processes.
• Versatile coarse UNC threading provides superior resistance to vibration loosening and is ideal for applications requiring frequent disassembly.

Professional Applications & Engineering Value

This 5/8"-11 UNC Grade B7 steel hex head screw is engineered to address critical challenges in heavy machinery, construction, and industrial systems where high tensile strength and thermal stability are paramount. The partially threaded design ensures that the unthreaded shank bears the majority of shear loads, preventing thread stripping and maintaining joint integrity under dynamic stresses. Manufactured from ASTM A193 compliant steel, this fastener excels in high-temperature applications such as pressure vessels, valve assemblies, and structural supports, where consistent performance under cyclic loading is essential. The coarse UNC thread and Class 2A fit facilitate quick alignment and secure fastening, reducing installation time while providing reliable vibration resistance. This combination of material properties and precision engineering makes it an optimal choice for engineers and procurement specialists seeking durable, specification-compliant fasteners for demanding operational environments.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with 5/8"-11 UNC coarse threading and complies with ASTM A193 manufacturing standards. Key dimensional specifications include a thread length of 1 1/2", overall length of 2 3/4", and grip length of 1 1/4". The fastener meets industry requirements for heavy-duty applications and is produced in accordance with recognized inch-system measurement standards, ensuring compatibility and performance consistency across industrial and construction equipment.