S-92220A124 4-40 x 3/4" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 140,000 psi tensile strength, these screws withstand high-stress applications without failure, ensuring long-term reliability in demanding environments.
• Precision Thread Fit – Class 3A thread fit provides tighter tolerances and superior engagement, reducing the risk of loosening and improving assembly accuracy.
• Corrosion-Resistant Finish – The black-oxide coating on alloy steel offers enhanced resistance to rust and wear, extending service life in various industrial conditions.
• Low Profile Head Design – The reduced head height allows for installation in confined spaces while maintaining a secure hex drive connection for easy, slip-resistant tightening.
• High Hardness for Durability – Rockwell C39 hardness ensures the screw maintains its shape and thread integrity under repeated use and high torque applications.
• Wide Regulatory Compliance – Meets ASTM A574 specifications and is compliant with RoHS 3 and REACH, ensuring safety and environmental standards are upheld.
• Coarse Thread Advantage – UNC coarse threads enable quicker installation and better performance in materials where fine threads may strip or fail.

Professional Applications & Engineering Value

These low profile socket head cap screws are engineered to address common challenges in precision assembly, such as space constraints and the need for reliable, high-strength fastening. Made from black-oxide alloy steel, they provide excellent resistance to corrosion and mechanical stress, making them ideal for use in machinery, automotive components, and electronic enclosures where vibration and load are concerns. The Class 3A thread fit and coarse UNC threading ensure secure fastening with minimal play, reducing maintenance needs and enhancing product lifespan. By incorporating a hex drive and fully threaded design, these screws facilitate efficient installation and removal, streamlining production processes in industrial settings.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including Class 3A thread fit for accurate engagement and UNC coarse thread spacing for reliable performance. It conforms to ASTM A574 specifications, ensuring consistent quality and mechanical properties. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety requirements in global supply chains.