S-94705A794 1"-8 x 4 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.
• High hardness rating (Rockwell C35) provides superior resistance to wear and deformation, extending service life in abrasive or high-stress environments.
• Coarse UNC threads with Class 2A fit offer faster assembly and better resistance to vibration loosening compared to fine threads, ideal for construction and heavy machinery.
• Partially threaded design allows for precise clamping force distribution, minimizing stress concentration and improving joint integrity.
• External hex drive and hex head enable high-torque installation with standard tools, facilitating quick and secure fastening in confined spaces.
• ASTM A193 Grade B7 compliance guarantees material quality and manufacturing consistency, meeting rigorous industrial standards for high-temperature and pressure applications.
• Robust steel construction combined with inch system dimensions ensures compatibility with existing North American machinery and structural components.

Professional Applications & Engineering Value

This 1"-8 UNC Grade B7 steel hex head screw is engineered to address common challenges in industrial fastening, such as joint failure under dynamic loads and corrosion in harsh environments. The partially threaded configuration concentrates clamping force where needed, reducing thread stripping risks in soft materials. With coarse threads and Class 2A fit, it resists vibration-induced loosening in machinery, construction frameworks, and pressure vessel assemblies. The ASTM A193 specification ensures consistent performance in high-temperature settings, making it a reliable choice for petrochemical, power generation, and heavy construction applications where 125,000 psi tensile strength and Rockwell C35 hardness are critical for safety and durability.

Specification Summary & Compliance

This fastener adheres to Class 2A thread fit tolerances for consistent engagement and meets ASTM A193 Grade B7 material and manufacturing standards. Dimensions include a 1"-8 UNC coarse thread, 2 1/4" thread length, and 4 3/4" total length in the inch system. It complies with industry regulations for high-strength steel bolts and is suitable for applications requiring RoHS and REACH environmental directives, ensuring safe use in various industrial sectors.