S-91670A310 10-32 x 1/2" ASTM A574 Left-Hand Threaded 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, reducing the risk of fastener failure.
• Corrosion-resistant black-oxide finish on alloy steel enhances durability and provides protection in harsh industrial environments.
• Precision Class 3A thread fit guarantees tight tolerances and secure fastening, minimizing loosening under vibration.
• Left-hand thread design offers specialized solutions for reverse-threading needs, preventing unintended disassembly in rotating machinery.
• Standard hex drive (5/32") allows for easy installation and removal with common tools, improving assembly efficiency.
• Full threading along the 1/2" length provides consistent grip and adjustability across the entire fastener.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chains.

Professional Applications & Engineering Value

This 10-32 UNF left-hand thread socket head cap screw is engineered to address critical challenges in demanding sectors like aerospace, automotive, and heavy machinery. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, resists wear and corrosion, extending service life in aggressive conditions. Its fine thread spacing and Class 3A thread fit deliver superior clamping force and vibration resistance, crucial for maintaining integrity in dynamic assemblies. The left-hand thread is ideal for applications where standard right-hand threads may loosen due to rotational forces, ensuring safety and reliability. By integrating this high-strength cap screw, engineers can achieve robust, long-lasting connections that minimize maintenance and downtime.

Specification Summary & Compliance

This socket head cap screw adheres to inch system measurements with precise dimensions: 10-32 UNF thread size, 1/2" length, and 5/32" hex drive. It features Class 3A thread fit for high accuracy and fully threaded design. Manufactured in compliance with ASTM A574 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and quality for industrial use.