S-92220A215 5/16"-18 x 5/8" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from the black-oxide finish, extending service life in demanding industrial environments.
• Superior strength and durability with a 140,000 psi tensile strength and Rockwell C39 hardness for high-stress applications.
• Precise and reliable fastening ensured by the Class 3A thread fit, minimizing the risk of loosening under vibration.
• Space-saving low-profile head design allows for installation in confined areas where clearance is limited.
• Efficient installation and removal with the internal hex drive, providing a secure grip for high-torque applications.
• Broad compatibility with the standard 5/16"-18 UNC coarse thread, suitable for a wide range of industrial components.
• Compliance with strict industry regulations including RoHS 3 and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This low socket head cap screw is engineered from black-oxide alloy steel to address critical challenges in machinery, automotive, and heavy equipment assembly. The Class 3A thread fit and UNC coarse threading provide exceptional clamp load retention, resisting loosening in high-vibration environments. The low-profile head is ideal for compact designs, enabling flush mounting without compromising the 140,000 psi tensile strength. Its ASTM A574 compliance guarantees consistent quality, making it a reliable choice for industrial fasteners requiring high performance and durability under strenuous conditions.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC coarse thread with a Class 3A thread fit for precise dimensional accuracy. It is manufactured in accordance with ASTM A574 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards.