S-91251A167 1 1/8"-7 x 6" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads and prevents failure in demanding applications.
• Superior corrosion resistance from the Black-Oxide finish on Alloy Steel, extending service life in harsh industrial environments.
• High torque capability with a 7/8" hex drive and standard socket head profile for secure installation and removal without stripping.
• Precise thread engagement with Class 2A fit and coarse UNRC threads for quick assembly and vibration resistance.
• Optimized for heavy-duty use featuring Rockwell C37 hardness and a 6" length for robust structural connections.
• Regulatory compliance with ASTM A574, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
• Versatile partial threading allows for adjustable clamping force and secure fastening in varied material thicknesses.

Professional Applications & Engineering Value

This Socket Head Cap Screw is engineered to solve critical challenges in heavy machinery, construction, and automotive assembly, where high tensile strength and durability are non-negotiable. The Black-Oxide Alloy Steel construction resists rust and wear, reducing maintenance costs in corrosive settings. Its coarse UNRC thread and Class 2A fit enable rapid installation with minimal cross-threading risks, while the partially threaded design provides flexibility for precise joint clamping. Ideal for securing large components, this fastener ensures long-term reliability in industrial applications, backed by rigorous standards compliance.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit and UNRC coarse thread standards with a size of 1 1/8"-7. It meets ASTM A574 specifications for high-strength bolts and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.