S-91864A033 8-32 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 various industrial environments without compromising structural integrity.
• Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash, ideal for assemblies requiring high vibration resistance.
• Hex socket drive design allows for easy installation and removal with standard tools, improving assembly efficiency and reducing labor time.
• Coarse UNC thread profile enables quick engagement and robust holding power, making it suitable for a wide range of materials and applications.
• Full compliance with ASTM A574 ensures consistent quality and mechanical properties, providing peace of mind for critical engineering projects.
• RoHS 3 and REACH compliance confirms environmental and safety standards are met, supporting sustainable and regulated manufacturing processes.

Professional Applications & Engineering Value

This 8-32 UNC thread socket head cap screw is engineered to address common industrial challenges such as vibration loosening and corrosion-induced degradation. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides excellent durability and wear resistance in harsh environments like machinery, automotive assemblies, and heavy equipment. Its coarse thread design ensures rapid installation and reliable grip in materials prone to stripping, while the hex drive allows for high torque application without slippage. Ideal for applications requiring high tensile strength and long-term reliability, this fastener minimizes maintenance needs and enhances operational safety in industrial fastening systems.

Specification Summary & Compliance

This socket head cap screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and UNC coarse threads per inch system requirements. It meets ASTM A574 specifications for material and mechanical properties, ensuring consistent performance. Additionally, the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental suitability for global industrial use.