S-91864A091 10-24 x 9/16" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh industrial environments and minimizing maintenance needs.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for assemblies requiring high vibration resistance.
• Robust Rockwell C37 hardness provides excellent wear resistance, maintaining thread integrity and drive engagement through repeated use.
• Standard hex drive (5/32") and socket head design allows for easy installation and removal with common tools, improving assembly efficiency.
• Coarse UNC 10-24 threading offers quick installation and strong holding power in a variety of materials, reducing assembly time.
• Full compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in industrial fastening, such as vibration loosening and environmental degradation. The Class 3A thread fit and coarse UNC threading provide superior clamp load retention in dynamic applications, from heavy machinery to automotive assemblies. The alloy steel construction with a protective black-oxide coating resists rust and wear, making it ideal for use in humid or chemically exposed settings. Its fully threaded design ensures consistent engagement across the entire length, offering reliable performance in high-stress joints where uniform load distribution is essential. These features make it a trusted choice for engineers seeking durability and compliance in industrial screws for OEM and MRO applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading (10-24) for robust engagement. It is manufactured in accordance with ASTM A574 specifications, ensuring material and mechanical properties meet industry requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various markets.