S-91251A133 5/8"-11 x 9" 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 applications
• Black-oxide coating on alloy steel provides superior corrosion resistance and durability
• Class 3A thread fit delivers precise, secure fastening with minimal play in critical assemblies
• Partially threaded design allows for optimal clamping force distribution and vibration resistance
• 1/2" hex drive socket enables high-torque installation without stripping or cam-out issues
• Rockwell C37 hardness maintains structural integrity under repeated loading conditions
• Coarse UNRC threading facilitates quick installation and removal in industrial environments

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw addresses critical engineering challenges in heavy machinery, manufacturing equipment, and structural applications where vibration resistance and high tensile strength are paramount. The partially threaded configuration provides optimal stress distribution, preventing thread stripping in soft materials while maintaining clamping force. The coarse UNRC thread pattern ensures rapid assembly in production environments, while the deep hex socket drive accommodates high-torque applications without fastener damage. Engineered for demanding industrial applications, this fastener combines material strength with precision manufacturing to solve vibration-induced loosening and structural integrity concerns in heavy-duty equipment.

Specification Summary & Compliance

This 5/8"-11 socket head cap screw features Class 3A thread fit for precision applications with coarse thread spacing and UNRC thread type. Manufactured to ASTM A574 specifications with Rockwell C37 hardness and 170,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.