S-90665A113 8-32 x 5/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by zinc plating protects against rust and environmental degradation, extending service life in harsh industrial environments.
• Precision Class 3A thread fit guarantees consistent engagement and secure fastening, minimizing assembly issues and improving joint integrity.
• Low-profile socket head design with 5/64" hex drive allows for easy installation in confined spaces while maintaining high torque capability.
• Fully threaded construction offers maximum grip length and uniform load distribution, enhancing holding power across the entire fastener length.
• High hardness rating of Rockwell C39 provides excellent wear resistance and maintains thread integrity through repeated installation cycles.
• Comprehensive compliance with ASTM A574, RoHS 3, and REACH standards ensures material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

These zinc-plated alloy steel socket head cap screws with 8-32 UNC coarse threads deliver critical engineering solutions where space constraints and high strength requirements intersect. The low-profile socket head design combined with the 5/64" hex drive enables efficient installation in tight clearance applications common in machinery, automotive assemblies, and electronic enclosures. The Class 3A thread fit provides superior dimensional accuracy that prevents cross-threading and ensures consistent clamp load distribution, addressing common assembly challenges in production environments. With 140,000 psi tensile strength and Rockwell C39 hardness, these fasteners maintain structural integrity under vibration and dynamic loading conditions, making them ideal for critical joints in manufacturing equipment, robotics, and aerospace components where reliability is paramount.

Specification Summary & Compliance

This socket head cap screw features precision 8-32 UNC coarse threads with Class 3A fit tolerances for optimal thread engagement. Manufacturing complies with ASTM A574 specification for alloy steel socket head cap screws, ensuring material consistency and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for international industrial markets requiring environmental compliance.