S-94705A413 3/4"-10 x 1 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 loads, reducing the risk of fastener failure in critical applications.
• Superior material durability with ASTM Grade B7 steel and Rockwell C35 hardness provides excellent resistance to wear, deformation, and stress corrosion cracking.
• Optimal thread engagement through fully threaded UNC coarse design delivers faster installation and enhanced vibration resistance in heavy machinery.
• Precision manufacturing with Class 2A thread fit guarantees consistent mating with nuts and threaded holes, minimizing assembly issues and rework.
• Robust hex head design with 1 1/4" width and 15/32" height allows for high-torque application using standard tools, speeding up maintenance and assembly processes.
• Industry-standard compliance with ASTM A193 specifications ensures material traceability and performance reliability for regulated industrial environments.
• Versatile coarse threading (3/4"-10 UNC) provides superior resistance to loosening in high-vibration applications while facilitating quick disassembly when needed.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade B7 steel hex head screws deliver exceptional performance in high-pressure and high-temperature environments. The combination of 125,000 psi tensile strength and Rockwell C35 hardness makes them ideal for critical connections in pressure vessel systems, valve assemblies, and structural steel frameworks where failure is not an option. The fully threaded UNC coarse pattern with Class 2A fit ensures maximum thread engagement and superior resistance to vibrational loosening, while the external hex drive design accommodates high torque applications with standard wrenching tools. These heavy-duty hex screws solve common engineering challenges including thermal expansion stress, cyclic loading, and corrosive operating conditions, making them the preferred choice for petrochemical, power generation, and heavy machinery applications requiring ASTM A193 certified components.

Specification Summary & Compliance

This 3/4"-10 UNC hex head screw features precision Class 2A thread fit with right-hand coarse threading and complies with ASTM A193 specification for high-temperature service. The fastener maintains dimensional accuracy per UNC thread standards with 1 3/4" length and meets material composition requirements for Grade B7 steel. Manufacturing follows strict quality controls to ensure consistent 125,000 psi tensile strength and Rockwell C35 hardness values. The product conforms to industry standards for heavy-duty applications and meets relevant material safety regulations.