S-91251A861 3/4"-10 x 7" 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 fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending the screw's service life in harsh industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening.
• High torque capability enabled by the 5/8" hex drive and standard socket head profile, allowing for easy installation and removal with standard tools.
• Optimized for heavy-duty use with a Rockwell C37 hardness, providing excellent wear resistance and durability.
• Versatile partial threading offers a non-threaded shank for precise clamping and alignment in structural applications.
• Compliance with major regulations including RoHS 3 and REACH, ensuring safety and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors. Its UNRC coarse thread and Class 3A fit provide superior resistance to vibration loosening, a common failure point in dynamic loads. The partially threaded design allows the unthreaded shank to bear shear loads directly, enhancing joint integrity. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands high-stress conditions without deforming, making it ideal for bolting applications in frames, presses, and equipment assemblies where reliability is non-negotiable.

Specification Summary & Compliance

This Socket Head Cap Screw adheres to ASTM A574 specifications, ensuring consistent quality and performance. Threads are manufactured to Class 3A precision for inch-series UNRC coarse threads (3/4"-10), providing tight tolerances. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in regulated markets without hazardous substances.