S-90128A804 5/8"-11 x 2 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-plated alloy steel extends service life and maintains integrity in harsh environments.
• Precise Class 3A thread fit provides tight, secure connections with minimal play, enhancing assembly accuracy and vibration resistance.
• Coarse UNC threads allow for quicker installation and easier alignment, saving time in production and maintenance.
• Hex drive design with 1/2" drive size offers high torque capability and secure tool engagement, preventing stripping during tightening.
• Rockwell C37 hardness ensures durability and wear resistance, maintaining thread integrity over repeated use.
• Compliance with ASTM A574 guarantees consistent quality and reliability, meeting rigorous industrial standards for socket head cap screws.

Professional Applications & Engineering Value

This 5/8"-11 UNC Socket Head Cap Screw is engineered for demanding industrial environments where high tensile strength and corrosion resistance are critical. Constructed from zinc-plated alloy steel, it effectively combats rust and degradation, making it ideal for machinery, automotive assemblies, and structural frameworks exposed to moisture or chemicals. The coarse thread design facilitates rapid installation in tough materials, while the partially threaded rod allows for precise clamping without compromising grip. With a hex drive socket head, it enables high-torque applications without slippage, ensuring secure fastening in heavy-duty equipment. This fastener addresses common challenges like vibration loosening and material fatigue, providing a robust solution for engineers seeking reliable, long-lasting threaded connections in inch-system applications.

Specification Summary & Compliance

This product features a Class 3A thread fit for precise tolerances, with UNC coarse threads and a right-hand thread direction. It adheres 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 reliability. Dimensions include a 1/2" drive size, 15/16" head diameter, and 2 1/2" length with a minimum thread length of 1 3/4", designed for consistent performance in inch-system applications.