S-91251A379 3/4"-10 x 6 3/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance and durability, extending service life in demanding environments.
• Class 3A thread fit offers superior precision and tight tolerances for secure, vibration-resistant assemblies in critical machinery.
• Partially threaded design with UNC coarse threads allows for easier alignment and faster installation, saving time in production and maintenance.
• 5/8" hex drive socket head enables high-torque application with standard tools, ensuring efficient and secure fastening in confined spaces.
• Rockwell C37 hardness maintains structural integrity under heavy loads, preventing deformation and ensuring long-term reliability.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting sustainable procurement.

Professional Applications & Engineering Value

This 3/4"-10 UNC socket head cap screw is engineered to address common industrial challenges, such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a Class 3A thread fit, ensures precise engagement and resistance to dynamic stresses in heavy machinery, automotive assemblies, and construction equipment. Its partially threaded configuration with coarse threads simplifies installation in high-volume production lines, reducing assembly time while maintaining high tensile strength. Ideal for applications requiring robust fastening solutions, this screw delivers consistent performance in environments where reliability and compliance with standards like ASTM A574 are critical.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads with a 3/4"-10 size. It meets ASTM A574 specifications for high-strength socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory alignment for industrial use.