S-92220A225 5/16"-18 x 1 1/2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in demanding industrial environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening in machinery and equipment.
• Low-profile socket head design allows for installation in tight spaces where clearance is limited, enhancing design flexibility.
• High hardness (Rockwell C39) provides excellent wear resistance, maintaining thread integrity through repeated use.
• Coarse UNC threading enables faster assembly and disassembly, improving maintenance efficiency in production settings.
• Full threading along the 1-1/2" length offers uniform clamping force and versatile positioning in assemblies.

Professional Applications & Engineering Value

Engineered for precision and durability, this low profile socket head cap screw addresses common industrial challenges such as space constraints and corrosive operating conditions. The black-oxide alloy steel construction not only resists rust but also withstands high mechanical loads, making it ideal for heavy machinery, automotive systems, and precision equipment. Its 5/16"-18 UNC Class 3A threads ensure a tight, reliable fit that prevents back-off under vibration, while the hex drive allows for secure torque application. By combining high tensile strength with a compact head profile, this screw simplifies assembly in confined areas, reducing downtime and enhancing structural integrity in demanding applications.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for superior accuracy and UNC coarse thread spacing for efficient fastening. Manufactured in accordance with ASTM A574 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.