S-90128A592 5/16"-18 x 2 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments.
• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions.
• Precise Class 3A thread fit provides secure, vibration-resistant fastening in demanding applications.
• Rockwell C37 hardness offers excellent wear resistance and durability for long-term use.
• 1/4" hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chains.
• Partially threaded shank enables optimal grip and alignment in assembled components, reducing loosening risks.

Professional Applications & Engineering Value

Engineered for industrial reliability, this zinc-plated alloy steel socket head cap screw addresses critical challenges in machinery, automotive, and heavy equipment assembly. The UNC coarse thread and Class 3A fit ensure rapid installation and high resistance to vibration, minimizing maintenance downtime. With a 170,000 PSI tensile strength and corrosion-resistant coating, it withstands extreme loads and environmental exposure, making it ideal for high-stress applications where failure is not an option. The 1/4" hex drive facilitates quick tool engagement, streamlining production processes while adhering to ASTM A574 standards for consistent performance.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC coarse thread with Class 3A thread fit for precise tolerances, a 2 1/4" length, and partial threading for versatile fastening. It conforms to ASTM A574 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.